Office.MessageCompose interface

The message compose mode of Office.context.mailbox.item.

Important: This is an internal Outlook object, not directly exposed through existing interfaces. You should treat this as a mode of Office.context.mailbox.item. For more information, refer to the Object Model page.

Parent interfaces:

Extends

Properties

bcc

Gets an object that provides methods to get or update the recipients on the Bcc (blind carbon copy) line of a message.

Depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

body

Gets an object that provides methods for manipulating the body of an item.

categories

Gets an object that provides methods for managing the item's categories.

Important: In Outlook on the web, you can't use the API to manage categories on a message in Compose mode.

cc

Provides access to the Cc (carbon copy) recipients of a message. The type of object and level of access depend on the mode of the current item.

The cc property returns a Recipients object that provides methods to get or update the recipients on the Cc line of the message. However, depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

conversationId

Gets an identifier for the email conversation that contains a particular message.

You can get an integer for this property if your mail app is activated in read forms or responses in compose forms. If subsequently the user changes the subject of the reply message, upon sending the reply, the conversation ID for that message will change and that value you obtained earlier will no longer apply.

You get null for this property for a new item in a compose form. If the user sets a subject and saves the item, the conversationId property will return a value.

delayDeliveryTime

Gets or sets the delayed delivery date and time of a message.

The delayDeliveryTime property returns a DelayDeliveryTime object that provides methods to manage the delivery date and time of the message.

from

Gets the email address of the sender of a message.

The from property returns a From object that provides a method to get the from value.

internetHeaders

Gets or sets the custom internet headers of a message.

The internetHeaders property returns an InternetHeaders object that provides methods to manage the internet headers on the message.

To learn more, see Get and set internet headers on a message in an Outlook add-in.

itemType

Gets the type of item that an instance represents.

The itemType property returns one of the ItemType enumeration values, indicating whether the item object instance is a message or an appointment.

notificationMessages

Gets the notification messages for an item.

seriesId

Gets the ID of the series that an instance belongs to.

In Outlook on the web and desktop clients, the seriesId returns the Exchange Web Services (EWS) ID of the parent (series) item that this item belongs to. However, on iOS and Android, the seriesId returns the REST ID of the parent item.

Note: The identifier returned by the seriesId property is the same as the Exchange Web Services item identifier. The seriesId property is not identical to the Outlook IDs used by the Outlook REST API. Before making REST API calls using this value, it should be converted using Office.context.mailbox.convertToRestId. For more details, see Use the Outlook REST APIs from an Outlook add-in.

The seriesId property returns null for items that do not have parent items such as single appointments, series items, or meeting requests and returns undefined for any other items that are not meeting requests.

sessionData

Manages the SessionData of an item in Compose mode.

Important: The entire SessionData object is limited to 50,000 characters per add-in.

subject

Gets or sets the description that appears in the subject field of an item.

The subject property gets or sets the entire subject of the item, as sent by the email server.

The subject property returns a Subject object that provides methods to get and set the subject.

to

Provides access to the recipients on the To line of a message. The type of object and level of access depend on the mode of the current item.

The to property returns a Recipients object that provides methods to get or update the recipients on the To line of the message. However, depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

Methods

addFileAttachmentAsync(uri, attachmentName, options, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentAsync method uploads the file at the specified URI and attaches it to the item in the compose form.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Important: In recent builds of Outlook on Windows, a bug was introduced that incorrectly appends an Authorization: Bearer header to this action (whether using this API or the Outlook UI). To work around this issue, you can try using the addFileAttachmentFromBase64 API introduced with requirement set 1.8.

addFileAttachmentAsync(uri, attachmentName, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentAsync method uploads the file at the specified URI and attaches it to the item in the compose form.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Important: In recent builds of Outlook on Windows, a bug was introduced that incorrectly appends an Authorization: Bearer header to this action (whether using this API or the Outlook UI). To work around this issue, you can try using the addFileAttachmentFromBase64 API introduced with requirement set 1.8.

addFileAttachmentFromBase64Async(base64File, attachmentName, options, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentFromBase64Async method uploads the file from the base64 encoding and attaches it to the item in the compose form. This method returns the attachment identifier in the asyncResult.value object.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Note: If you're using a data URL API (e.g., readAsDataURL), you need to strip out the data URL prefix then send the rest of the string to this API. For example, if the full string is represented by data:image/svg+xml;base64,<rest of base64 string>, remove data:image/svg+xml;base64,.

addFileAttachmentFromBase64Async(base64File, attachmentName, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentFromBase64Async method uploads the file from the base64 encoding and attaches it to the item in the compose form. This method returns the attachment identifier in the asyncResult.value object.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Note: If you're using a data URL API (e.g., readAsDataURL), you need to strip out the data URL prefix then send the rest of the string to this API. For example, if the full string is represented by data:image/svg+xml;base64,<rest of base64 string>, remove data:image/svg+xml;base64,.

addHandlerAsync(eventType, handler, options, callback)

Adds an event handler for a supported event. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

addHandlerAsync(eventType, handler, callback)

Adds an event handler for a supported event. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

addItemAttachmentAsync(itemId, attachmentName, options, callback)

Adds an Exchange item, such as a message, as an attachment to the message or appointment.

The addItemAttachmentAsync method attaches the item with the specified Exchange identifier to the item in the compose form. If you specify a callback function, the method is called with one parameter, asyncResult, which contains either the attachment identifier or a code that indicates any error that occurred while attaching the item. You can use the options parameter to pass state information to the callback function, if needed.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

If your Office Add-in is running in Outlook on the web, the addItemAttachmentAsync method can attach items to items other than the item that you are editing; however, this is not supported and is not recommended.

addItemAttachmentAsync(itemId, attachmentName, callback)

Adds an Exchange item, such as a message, as an attachment to the message or appointment.

The addItemAttachmentAsync method attaches the item with the specified Exchange identifier to the item in the compose form. If you specify a callback function, the method is called with one parameter, asyncResult, which contains either the attachment identifier or a code that indicates any error that occurred while attaching the item. You can use the options parameter to pass state information to the callback function, if needed.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

If your Office Add-in is running in Outlook on the web, the addItemAttachmentAsync method can attach items to items other than the item that you are editing; however, this is not supported and is not recommended.

close()

Closes the current item that is being composed

The behaviors of the close method depends on the current state of the item being composed. If the item has unsaved changes, the client prompts the user to save, discard, or close the action.

In the Outlook desktop client, if the message is an inline reply, the close method has no effect.

Note: In Outlook on the web, if the item is an appointment and it has previously been saved using saveAsync, the user is prompted to save, discard, or cancel even if no changes have occurred since the item was last saved.

disableClientSignatureAsync(options, callback)

Disables the Outlook client signature.

For Windows and Mac rich clients, this API sets the signature under the "New Message" and "Replies/Forwards" sections for the sending account to "(none)", effectively disabling the signature. For Outlook on the web, the API should disable the signature option for new mails, replies, and forwards. If the signature is selected, this API call should disable it.

disableClientSignatureAsync(callback)

Disables the Outlook client signature.

For Windows and Mac rich clients, this API sets the signature under the "New Message" and "Replies/Forwards" sections for the sending account to "(none)", effectively disabling the signature. For Outlook on the web, the API should disable the signature option for new mails, replies, and forwards. If the signature is selected, this API call should disable it.

getAttachmentContentAsync(attachmentId, options, callback)

Gets an attachment from a message or appointment and returns it as an AttachmentContent object.

The getAttachmentContentAsync method gets the attachment with the specified identifier from the item. As a best practice, you should get the attachment's identifier from a getAttachmentsAsync call, then in the same session, use that identifier to retrieve the attachment. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

getAttachmentContentAsync(attachmentId, callback)

Gets an attachment from a message or appointment and returns it as an AttachmentContent object.

The getAttachmentContentAsync method gets the attachment with the specified identifier from the item. As a best practice, you should get the attachment's identifier from a getAttachmentsAsync call, then in the same session, use that identifier to retrieve the attachment. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

getAttachmentsAsync(options, callback)

Gets the item's attachments as an array.

getAttachmentsAsync(callback)

Gets the item's attachments as an array.

getComposeTypeAsync(options, callback)

Specifies the type of message compose and its coercion type. The message can be new, or a reply or forward. The coercion type can be HTML or plain text.

getComposeTypeAsync(callback)

Specifies the type of message compose and its coercion type. The message can be new, or a reply or forward. The coercion type can be HTML or plain text.

getInitializationContextAsync(options, callback)

Gets initialization data passed when the add-in is activated by an actionable message.

getInitializationContextAsync(callback)

Gets initialization data passed when the add-in is activated by an actionable message.

getItemIdAsync(options, callback)

Asynchronously gets the ID of a saved item.

When invoked, this method returns the item ID via the callback function.

Note: If your add-in calls getItemIdAsync on an item in compose mode (e.g., to get an itemId to use with EWS or the REST API), be aware that when Outlook is in cached mode, it may take some time before the item is synced to the server. Until the item is synced, the itemId is not recognized and using it returns an error.

getItemIdAsync(callback)

Asynchronously gets the ID of a saved item.

When invoked, this method returns the item ID via the callback function.

Note: If your add-in calls getItemIdAsync on an item in compose mode (e.g., to get an itemId to use with EWS or the REST API), be aware that when Outlook is in cached mode, it may take some time before the item is synced to the server. Until the item is synced, the itemId is not recognized and using it returns an error.

getSelectedDataAsync(coercionType, options, callback)

Asynchronously returns selected data from the subject or body of a message.

If there is no selection but the cursor is in the body or subject, the method returns an empty string for the selected data. If a field other than the body or subject is selected, the method returns the InvalidSelection error.

To access the selected data from the callback function, call asyncResult.value.data. To access the source property that the selection comes from, call asyncResult.value.sourceProperty, which will be either body or subject.

getSelectedDataAsync(coercionType, callback)

Asynchronously returns selected data from the subject or body of a message.

If there is no selection but the cursor is in the body or subject, the method returns an empty string for the selected data. If a field other than the body or subject is selected, the method returns the InvalidSelection error.

To access the selected data from the callback function, call asyncResult.value.data. To access the source property that the selection comes from, call asyncResult.value.sourceProperty, which will be either body or subject.

getSharedPropertiesAsync(options, callback)

Gets the properties of an appointment or message in a shared folder or shared mailbox (now in preview).

For more information around using this API, see the shared folders and shared mailbox article.

Note: This method is not supported in Outlook on iOS or Android.

getSharedPropertiesAsync(callback)

Gets the properties of an appointment or message in a shared folder or shared mailbox (now in preview).

For more information around using this API, see the shared folders and shared mailbox article.

Note: This method is not supported in Outlook on iOS or Android.

isClientSignatureEnabledAsync(options, callback)

Gets if the client signature is enabled.

For Windows and Mac rich clients, the API call should return true if the default signature for new messages, replies, or forwards is set to a template for the sending Outlook account. For Outlook on the web, the API call should return true if the signature is enabled for compose types newMail, reply, or forward. If the settings are set to "(none)" in Mac or Windows rich clients or disabled in Outlook on the Web, the API call should return false.

isClientSignatureEnabledAsync(callback)

Gets if the client signature is enabled.

For Windows and Mac rich clients, the API call should return true if the default signature for new messages, replies, or forwards is set to a template for the sending Outlook account. For Outlook on the web, the API call should return true if the signature is enabled for compose types newMail, reply, or forward. If the settings are set to "(none)" in Mac or Windows rich clients or disabled in Outlook on the Web, the API call should return false.

loadCustomPropertiesAsync(callback, userContext)

Asynchronously loads custom properties for this add-in on the selected item.

Custom properties are stored as key-value pairs on a per-app, per-item basis. This method returns a CustomProperties object in the callback, which provides methods to access the custom properties specific to the current item and the current add-in. Custom properties aren't encrypted on the item, so this shouldn't be used as secure storage.

The custom properties are provided as a CustomProperties object in the asyncResult.value property. This object can be used to get, set, save, and remove custom properties from the mail item.

removeAttachmentAsync(attachmentId, options, callback)

Removes an attachment from a message or appointment.

The removeAttachmentAsync method removes the attachment with the specified identifier from the item. As a best practice, you should use the attachment identifier to remove an attachment only if the same mail app has added that attachment in the same session. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

removeAttachmentAsync(attachmentId, callback)

Removes an attachment from a message or appointment.

The removeAttachmentAsync method removes the attachment with the specified identifier from the item. As a best practice, you should use the attachment identifier to remove an attachment only if the same mail app has added that attachment in the same session. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

removeHandlerAsync(eventType, options, callback)

Removes the event handlers for a supported event type. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

removeHandlerAsync(eventType, callback)

Removes the event handlers for a supported event type. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

saveAsync(options, callback)

Asynchronously saves an item.

When invoked, this method saves the current message as a draft and returns the item ID via the callback function. In Outlook on the web or Outlook in online mode, the item is saved to the server. In Outlook in cached mode, the item is saved to the local cache.

Since appointments have no draft state, if saveAsync is called on an appointment in compose mode, the item will be saved as a normal appointment on the user's calendar. For new appointments that have not been saved before, no invitation will be sent. Saving an existing appointment will send an update to added or removed attendees.

When working with HTML-formatted content, it's important to note that the Outlook client may modify the content. This means that subsequent calls to methods like Body.getAsync, Body.setAsync, and even saveAsync may not result in the same content.

Note: If your add-in calls saveAsync on an item in compose mode in order to get an item ID to use with EWS or the REST API, be aware that when Outlook is in cached mode, it may take some time before the item is actually synced to the server. Until the item is synced, using the itemId will return an error.

saveAsync(callback)

Asynchronously saves an item.

When invoked, this method saves the current message as a draft and returns the item ID via the callback function. In Outlook on the web or Outlook in online mode, the item is saved to the server. In Outlook in cached mode, the item is saved to the local cache.

Since appointments have no draft state, if saveAsync is called on an appointment in compose mode, the item will be saved as a normal appointment on the user's calendar. For new appointments that have not been saved before, no invitation will be sent. Saving an existing appointment will send an update to added or removed attendees.

When working with HTML-formatted content, it's important to note that the Outlook client may modify the content. This means that subsequent calls to methods like Body.getAsync, Body.setAsync, and even saveAsync may not result in the same content.

Note: If your add-in calls saveAsync on an item in compose mode in order to get an item ID to use with EWS or the REST API, be aware that when Outlook is in cached mode, it may take some time before the item is actually synced to the server. Until the item is synced, using the itemId will return an error.

setSelectedDataAsync(data, options, callback)

Asynchronously inserts data into the body or subject of a message.

The setSelectedDataAsync method inserts the specified string at the cursor location in the subject or body of the item, or, if text is selected in the editor, it replaces the selected text. If the cursor is not in the body or subject field, an error is returned. After insertion, the cursor is placed at the end of the inserted content.

setSelectedDataAsync(data, callback)

Asynchronously inserts data into the body or subject of a message.

The setSelectedDataAsync method inserts the specified string at the cursor location in the subject or body of the item, or, if text is selected in the editor, it replaces the selected text. If the cursor is not in the body or subject field, an error is returned. After insertion, the cursor is placed at the end of the inserted content.

Property Details

bcc

Gets an object that provides methods to get or update the recipients on the Bcc (blind carbon copy) line of a message.

Depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

bcc: Recipients;

Property Value

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

Office.context.mailbox.item.bcc.setAsync( ['alice@contoso.com', 'bob@contoso.com'] );
Office.context.mailbox.item.bcc.addAsync( ['jason@contoso.com'] );
Office.context.mailbox.item.bcc.getAsync(callback);

function callback(asyncResult) {
    const arrayOfBccRecipients = asyncResult.value;
}
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/30-recipients-and-attendees/get-set-bcc-message-compose.yaml
Office.context.mailbox.item.bcc.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const msgBcc = asyncResult.value;
    console.log("Message being blind-copied to:");
    for (let i = 0; i < msgBcc.length; i++) {
      console.log(msgBcc[i].displayName + " (" + msgBcc[i].emailAddress + ")");
    }
  } else {
    console.error(asyncResult.error);
  }
});

...
const email = $("#emailBcc")
  .val()
  .toString();
const emailArray = [email];
Office.context.mailbox.item.bcc.setAsync(emailArray, function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("Succeeded in setting Bcc field.");
  } else {
    console.error(asyncResult.error);
  }
});

body

Gets an object that provides methods for manipulating the body of an item.

body: Body;

Property Value

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// This example gets the body of the item as plain text.
Office.context.mailbox.item.body.getAsync(
    "text",
    { asyncContext: "This is passed to the callback" },
    function callback(result) {
        // Do something with the result.
    });

// The following is an example of the result parameter passed to the callback function.
{
    "value": "TEXT of whole body (including threads below)",
    "status": "succeeded",
    "asyncContext": "This is passed to the callback"
}

categories

Gets an object that provides methods for managing the item's categories.

Important: In Outlook on the web, you can't use the API to manage categories on a message in Compose mode.

categories: Categories;

Property Value

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/45-categories/work-with-categories.yaml
Office.context.mailbox.item.categories.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const categories = asyncResult.value;
    if (categories && categories.length > 0) {
      console.log("Categories assigned to this item:");
      console.log(JSON.stringify(categories));
    } else {
      console.log("There are no categories assigned to this item.");
    }
  } else {
    console.error(asyncResult.error);
  }
});

...
// Note: In order for you to successfully add a category,
// it must be in the mailbox categories master list.

Office.context.mailbox.masterCategories.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const masterCategories = asyncResult.value;
    if (masterCategories && masterCategories.length > 0) {
      // Grab the first category from the master list.
      const categoryToAdd = [masterCategories[0].displayName];
      Office.context.mailbox.item.categories.addAsync(categoryToAdd, function(asyncResult) {
        if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
          console.log(`Successfully assigned category '${categoryToAdd}' to item.`);
        } else {
          console.log("categories.addAsync call failed with error: " + asyncResult.error.message);
        }
      });
    } else {
      console.log("There are no categories in the master list on this mailbox. You can add categories using Office.context.mailbox.masterCategories.addAsync.");
    }
  } else {
    console.error(asyncResult.error);
  }
});

...
Office.context.mailbox.item.categories.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const categories = asyncResult.value;
    if (categories && categories.length > 0) {
      // Grab the first category assigned to this item.
      const categoryToRemove = [categories[0].displayName];
      Office.context.mailbox.item.categories.removeAsync(categoryToRemove, function(asyncResult) {
        if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
          console.log(`Successfully unassigned category '${categoryToRemove}' from this item.`);
        } else {
          console.log("categories.removeAsync call failed with error: " + asyncResult.error.message);
        }
      });
    } else {
      console.log("There are no categories assigned to this item.");
    }
  } else {
    console.error(asyncResult.error);
  }
});

cc

Provides access to the Cc (carbon copy) recipients of a message. The type of object and level of access depend on the mode of the current item.

The cc property returns a Recipients object that provides methods to get or update the recipients on the Cc line of the message. However, depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

cc: Recipients;

Property Value

Remarks

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

Office.context.mailbox.item.cc.setAsync( ['alice@contoso.com', 'bob@contoso.com'] );
Office.context.mailbox.item.cc.addAsync( ['jason@contoso.com'] );
Office.context.mailbox.item.cc.getAsync(callback);

function callback(asyncResult) {
    const arrayOfCcRecipients = asyncResult.value;
}
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/30-recipients-and-attendees/get-set-cc-message-compose.yaml
Office.context.mailbox.item.cc.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const msgCc = asyncResult.value;
    console.log("Message being copied to:");
    for (let i = 0; i < msgCc.length; i++) {
      console.log(msgCc[i].displayName + " (" + msgCc[i].emailAddress + ")");
    }
  } else {
    console.error(asyncResult.error);
  }
});

...
const email = $("#emailCc")
  .val()
  .toString();
const emailArray = [email];
Office.context.mailbox.item.cc.setAsync(emailArray, function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("Succeeded in setting Cc field.");
  } else {
    console.error(asyncResult.error);
  }
});

conversationId

Gets an identifier for the email conversation that contains a particular message.

You can get an integer for this property if your mail app is activated in read forms or responses in compose forms. If subsequently the user changes the subject of the reply message, upon sending the reply, the conversation ID for that message will change and that value you obtained earlier will no longer apply.

You get null for this property for a new item in a compose form. If the user sets a subject and saves the item, the conversationId property will return a value.

conversationId: string;

Property Value

string

Remarks

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/90-other-item-apis/get-conversation-id-message.yaml
console.log(`Conversation ID: ${Office.context.mailbox.item.conversationId}`);

delayDeliveryTime

Note

This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.

Gets or sets the delayed delivery date and time of a message.

The delayDeliveryTime property returns a DelayDeliveryTime object that provides methods to manage the delivery date and time of the message.

delayDeliveryTime: DelayDeliveryTime;

Property Value

Remarks

[ API set: Mailbox preview ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

const date_1 = new Date();
const date_2 = new Date(date_1.getTime() + 2*60000);  // Sending with 2-minute delay.
Office.context.mailbox.item.delayDeliveryTime.setAsync(
    date_2,
    function(callback) {
        console.log(callback);
    });

from

Gets the email address of the sender of a message.

The from property returns a From object that provides a method to get the from value.

from: From;

Property Value

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/30-recipients-and-attendees/get-from-message-compose.yaml
Office.context.mailbox.item.from.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const msgFrom = asyncResult.value;
    console.log("Message from: " + msgFrom.displayName + " (" + msgFrom.emailAddress + ")");
  } else {
    console.error(asyncResult.error);
  }
});

internetHeaders

Gets or sets the custom internet headers of a message.

The internetHeaders property returns an InternetHeaders object that provides methods to manage the internet headers on the message.

To learn more, see Get and set internet headers on a message in an Outlook add-in.

internetHeaders: InternetHeaders;

Property Value

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/70-mime-headers/manage-custom-internet-headers-message-compose.yaml
Office.context.mailbox.item.internetHeaders.getAsync(
  ["x-preferred-fruit", "x-preferred-vegetable", "x-best-vegetable", "x-nonexistent-header"],
  function (asyncResult) {
    if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
      console.log("Selected headers: " + JSON.stringify(asyncResult.value));
    } else {
      console.log("Error getting selected headers: " + JSON.stringify(asyncResult.error));
    }
  }
);

itemType

Gets the type of item that an instance represents.

The itemType property returns one of the ItemType enumeration values, indicating whether the item object instance is a message or an appointment.

itemType: MailboxEnums.ItemType | string;

Property Value

Remarks

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/90-other-item-apis/get-item-type.yaml
const itemType = Office.context.mailbox.item.itemType;
switch (itemType) {
    case Office.MailboxEnums.ItemType.Appointment:
        console.log(`Current item is an ${itemType}.`);
        break;
    case Office.MailboxEnums.ItemType.Message:
        console.log(`Current item is a ${itemType}. A message could be an email, meeting request, meeting response, or meeting cancellation.`);
        break;
}

notificationMessages

Gets the notification messages for an item.

notificationMessages: NotificationMessages;

Property Value

Remarks

[ API set: Mailbox 1.3 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/35-notifications/add-getall-remove.yaml
const id = $("#notificationId").val();
const details =
  {
    type: Office.MailboxEnums.ItemNotificationMessageType.ProgressIndicator,
    message: "Progress indicator with id = " + id
  };
Office.context.mailbox.item.notificationMessages.addAsync(id, details, handleResult);

...
const id = $("#notificationId").val();
const details =
  {
    type: Office.MailboxEnums.ItemNotificationMessageType.InformationalMessage,
    message: "Non-persistent informational notification message with id = " + id,
    icon: "icon1",
    persistent: false
  };
Office.context.mailbox.item.notificationMessages.addAsync(id, details, handleResult);

...
const id = $("#notificationId").val();
const details =
  {
    type: Office.MailboxEnums.ItemNotificationMessageType.InformationalMessage,
    message: "Persistent informational notification message with id = " + id,
    icon: "icon1",
    persistent: true
  };
Office.context.mailbox.item.notificationMessages.addAsync(id, details, handleResult);

...
Office.context.mailbox.item.notificationMessages.getAllAsync(handleResult);          

...
const id = $("#notificationId").val();
Office.context.mailbox.item.notificationMessages.replaceAsync(
  id,
  {
    type: Office.MailboxEnums.ItemNotificationMessageType.InformationalMessage,
    message: "Notification message with id = " + id + " has been replaced with an informational message.",
    icon: "icon2",
    persistent: false
  },
  handleResult);

...
const id = $("#notificationId").val();
Office.context.mailbox.item.notificationMessages.removeAsync(id, handleResult);

seriesId

Gets the ID of the series that an instance belongs to.

In Outlook on the web and desktop clients, the seriesId returns the Exchange Web Services (EWS) ID of the parent (series) item that this item belongs to. However, on iOS and Android, the seriesId returns the REST ID of the parent item.

Note: The identifier returned by the seriesId property is the same as the Exchange Web Services item identifier. The seriesId property is not identical to the Outlook IDs used by the Outlook REST API. Before making REST API calls using this value, it should be converted using Office.context.mailbox.convertToRestId. For more details, see Use the Outlook REST APIs from an Outlook add-in.

The seriesId property returns null for items that do not have parent items such as single appointments, series items, or meeting requests and returns undefined for any other items that are not meeting requests.

seriesId: string;

Property Value

string

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/50-recurrence/get-series-id.yaml
const seriesId = Office.context.mailbox.item.seriesId;

if (seriesId === undefined) {
  console.log("This is a message that's not a meeting request.");
} else if (seriesId === null) {
  console.log("This is a single appointment, a parent series, or a meeting request for a series or single meeting.");
} else {
  console.log("This is an instance belonging to series with ID " + seriesId);
}

sessionData

Manages the SessionData of an item in Compose mode.

Important: The entire SessionData object is limited to 50,000 characters per add-in.

sessionData: SessionData;

Property Value

Remarks

[ API set: Mailbox 1.11 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/60-event-based-activation/session-data-apis.yaml
Office.context.mailbox.item.sessionData.getAllAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("The sessionData is " + JSON.stringify(asyncResult.value));
  } else {
    console.log("Failed to get all sessionData. Error: " + JSON.stringify(asyncResult.error));
  }
});

subject

Gets or sets the description that appears in the subject field of an item.

The subject property gets or sets the entire subject of the item, as sent by the email server.

The subject property returns a Subject object that provides methods to get and set the subject.

subject: Subject;

Property Value

Remarks

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/90-other-item-apis/get-set-subject-compose.yaml
Office.context.mailbox.item.subject.getAsync((result) => {
  if (result.status !== Office.AsyncResultStatus.Succeeded) {
    console.error(`Action failed with message ${result.error.message}`);
    return;
  }
  console.log(`Subject: ${result.value}`);
});

...
let subject = "Hello World!";
Office.context.mailbox.item.subject.setAsync(subject, (result) => {
  if (result.status !== Office.AsyncResultStatus.Succeeded) {
    console.error(`Action failed with message ${result.error.message}`);
    return;
  }
  console.log(`Successfully set subject to ${subject}`);
});

to

Provides access to the recipients on the To line of a message. The type of object and level of access depend on the mode of the current item.

The to property returns a Recipients object that provides methods to get or update the recipients on the To line of the message. However, depending on the client/platform (i.e., Windows, Mac, etc.), limits may apply on how many recipients you can get or update. See the Recipients object for more details.

to: Recipients;

Property Value

Remarks

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

Office.context.mailbox.item.to.setAsync( ['alice@contoso.com', 'bob@contoso.com'] );
Office.context.mailbox.item.to.addAsync( ['jason@contoso.com'] );
Office.context.mailbox.item.to.getAsync(callback);

function callback(asyncResult) {
    const arrayOfToRecipients = asyncResult.value;
}
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/30-recipients-and-attendees/get-set-to-message-compose.yaml
Office.context.mailbox.item.to.getAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const msgTo = asyncResult.value;
    console.log("Message being sent to:");
    for (let i = 0; i < msgTo.length; i++) {
      console.log(msgTo[i].displayName + " (" + msgTo[i].emailAddress + ")");
    }
  } else {
    console.error(asyncResult.error);
  }
});

...
const email = $("#emailTo")
  .val()
  .toString();
const emailArray = [email];
Office.context.mailbox.item.to.setAsync(emailArray, function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("Succeeded in setting To field.");
  } else {
    console.error(asyncResult.error);
  }
});

Method Details

addFileAttachmentAsync(uri, attachmentName, options, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentAsync method uploads the file at the specified URI and attaches it to the item in the compose form.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Important: In recent builds of Outlook on Windows, a bug was introduced that incorrectly appends an Authorization: Bearer header to this action (whether using this API or the Outlook UI). To work around this issue, you can try using the addFileAttachmentFromBase64 API introduced with requirement set 1.8.

addFileAttachmentAsync(uri: string, attachmentName: string, options: Office.AsyncContextOptions & { isInline: boolean }, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

uri

string

The URI that provides the location of the file to attach to the message or appointment. The maximum length is 2048 characters.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

options

Office.AsyncContextOptions & { isInline: boolean }

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function. isInline: If true, indicates that the attachment will be shown inline in the message body, and should not be displayed in the attachment list.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If uploading the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentSizeExceeded: The attachment is larger than allowed.

  • FileTypeNotSupported: The attachment has an extension that is not allowed.

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

Examples

function callback(result) {
    if (result.error) {
        console.log(result.error);
    } else {
        console.log("Attachment added");
    }
}

function addAttachment() {
    // The values in asyncContext can be accessed in the callback.
    const options = { 'asyncContext': { var1: 1, var2: 2 } };

    const attachmentURL = "https://contoso.com/rtm/icon.png";
    Office.context.mailbox.item.addFileAttachmentAsync(attachmentURL, attachmentURL, options, callback);
}
// The following example adds an image file as an inline attachment and
// references the attachment in the message body.
Office.context.mailbox.item.addFileAttachmentAsync(
    "http://i.imgur.com/WJXklif.png",
    "cute_bird.png",
    {
        isInline: true
    },
    function (asyncResult) {
        Office.context.mailbox.item.body.setAsync(
            "<p>Here's a cute bird!</p><img src='cid:cute_bird.png'>",
            {
                "coercionType": "html"
            },
            function (asyncResult) {
                // Do something here.
            });
    });
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
const attachmentUrl = $("#attachmentUrl").val();
Office.context.mailbox.item.addFileAttachmentAsync(
    attachmentUrl,
    getFileName(attachmentUrl),
    { "asyncContext" : { var1: 1, var2: true } },
    function(result) { console.log(result); });

addFileAttachmentAsync(uri, attachmentName, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentAsync method uploads the file at the specified URI and attaches it to the item in the compose form.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Important: In recent builds of Outlook on Windows, a bug was introduced that incorrectly appends an Authorization: Bearer header to this action (whether using this API or the Outlook UI). To work around this issue, you can try using the addFileAttachmentFromBase64 API introduced with requirement set 1.8.

addFileAttachmentAsync(uri: string, attachmentName: string, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

uri

string

The URI that provides the location of the file to attach to the message or appointment. The maximum length is 2048 characters.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If uploading the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentSizeExceeded: The attachment is larger than allowed.

  • FileTypeNotSupported: The attachment has an extension that is not allowed.

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

addFileAttachmentFromBase64Async(base64File, attachmentName, options, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentFromBase64Async method uploads the file from the base64 encoding and attaches it to the item in the compose form. This method returns the attachment identifier in the asyncResult.value object.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Note: If you're using a data URL API (e.g., readAsDataURL), you need to strip out the data URL prefix then send the rest of the string to this API. For example, if the full string is represented by data:image/svg+xml;base64,<rest of base64 string>, remove data:image/svg+xml;base64,.

addFileAttachmentFromBase64Async(base64File: string, attachmentName: string, options: Office.AsyncContextOptions & { isInline: boolean }, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

base64File

string

The base64-encoded content of an image or file to be added to an email or event.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

options

Office.AsyncContextOptions & { isInline: boolean }

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function. isInline: If true, indicates that the attachment will be shown inline in the message body and should not be displayed in the attachment list.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If uploading the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentSizeExceeded: The attachment is larger than allowed.

  • FileTypeNotSupported: The attachment has an extension that is not allowed.

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

Note: If you're adding an inline base64 image to the body of a message or appointment being composed, you must first get the current item body using the Office.context.mailbox.item.body.getAsync method before inserting the image using addFileAttachmentFromBase64Async. Otherwise, the image will not render in the body once it's inserted. For further guidance, see Attach a file.

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
base64String = "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";
Office.context.mailbox.item.addFileAttachmentFromBase64Async(
    base64String,
    "logo.png",
    { isInline: false },
    function(result) { console.log(result); });

...
// Set the signature for the current item with inline image.
const modIcon1Base64 = "iVBORw0KGgoAAAANSUhEUgAAABwAAAAcCAYAAAByDd+UAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA2ZpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuMC1jMDYxIDY0LjE0MDk0OSwgMjAxMC8xMi8wNy0xMDo1NzowMSAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDpDRDMxMDg1MjBCNDZFMTExODE2MkM1RUI2M0M4MDYxRCIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDpFMTUxQjgyRjQ2MEQxMUUxODlFMkQwNTYzQ0YwMTUxMiIgeG1wTU06SW5zdGFuY2VJRD0ieG1wLmlpZDpFMTUxQjgyRTQ2MEQxMUUxODlFMkQwNTYzQ0YwMTUxMiIgeG1wOkNyZWF0b3JUb29sPSJBZG9iZSBQaG90b3Nob3AgQ1M1LjEgV2luZG93cyI+IDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOkQxMzEwODUyMEI0NkUxMTE4MTYyQzVFQjYzQzgwNjFEIiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOkNEMzEwODUyMEI0NkUxMTE4MTYyQzVFQjYzQzgwNjFEIi8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+uC/WfAAAAehJREFUeNpilCzfwEAEkAbiECA2A2J1IOaHin8E4ptAfBaIVwLxU0IGMRKw0B6IW4DYhoE4cASIK6E0VsCEQ1wUiNcB8QESLGOAqj0MxBuhZhBloS4QnwHiQAbygR/UDF1CFupCXSjHQDmQg5qli8tCUBBsQUoQ1AD8UDNFsVk4n0o+w+bT+egWglKjNymmeGhLkqLcG2oHAwtUoIuQDj5OVgZPLUmwRe5aEmAxqYqNpFgKssOcCeplM0KqdST5GfpDDRm0JfkYrj3/SE7QguyQY4ImYYLgCtAS10kHGMw6dzNsv/qC7OwCClJXYlR++v6b4er3j5QmIFcmaNlIL6AOslCIjhYKMTHQGTBBqxh6gXcgC6/R0cKbIAv30dHCfaAKGJTxHxJSqS3Fz9DkowNmywpyMcgA8fF7b8D8VWcfM6w8+4gYC+VB+RCk8hSh0gaUD4/dewvlvUWRe/z+GzGWgex4BGtiOAHxXhoHpzMoSGHZAhSPW2lo2VZYWkHOh4nEtLrIAE+hZmNUwK+B2BOIv1PRsu9QM1/jatNcBtVZ0IREKXgENesyoVYbzNIdFFi2A5tl+NqlL6BB4QBNzsSCU1A9nlAzMAALAQMOQl0qB23qWwKxIlIrDBQ394H4OBCvISYqAAIMACVibHDqsO7zAAAAAElFTkSuQmCC";
Office.context.mailbox.item.addFileAttachmentFromBase64Async(
  modIcon1Base64,
  "myImage.png",
  { isInline: true },
  function(result) {
    if (result.status == Office.AsyncResultStatus.Succeeded) {
      const signature = $("#signature").val() + "<img src='cid:myImage.png'>";
      console.log(`Setting signature to "${signature}".`);
      Office.context.mailbox.item.body.setSignatureAsync(
        signature,
        { coercionType: "html" },
        function(asyncResult) {
          console.log(`setSignatureAsync: ${asyncResult.status}`);
        }
      );
    } else {
      console.error(`addFileAttachmentFromBase64Async: ${result.error}`);
    }
  }
);

addFileAttachmentFromBase64Async(base64File, attachmentName, callback)

Adds a file to a message or appointment as an attachment.

The addFileAttachmentFromBase64Async method uploads the file from the base64 encoding and attaches it to the item in the compose form. This method returns the attachment identifier in the asyncResult.value object.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

Note: If you're using a data URL API (e.g., readAsDataURL), you need to strip out the data URL prefix then send the rest of the string to this API. For example, if the full string is represented by data:image/svg+xml;base64,<rest of base64 string>, remove data:image/svg+xml;base64,.

addFileAttachmentFromBase64Async(base64File: string, attachmentName: string, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

base64File

string

The base64-encoded content of an image or file to be added to an email or event.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If uploading the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentSizeExceeded: The attachment is larger than allowed.

  • FileTypeNotSupported: The attachment has an extension that is not allowed.

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

Note: If you're adding an inline base64 image to the body of a message or appointment being composed, you must first get the current item body using the Office.context.mailbox.item.body.getAsync method before inserting the image using addFileAttachmentFromBase64Async. Otherwise, the image will not render in the body once it's inserted. For further guidance, see Attach a file.

addHandlerAsync(eventType, handler, options, callback)

Adds an event handler for a supported event. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

addHandlerAsync(eventType: Office.EventType | string, handler: any, options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

eventType

Office.EventType | string

The event that should invoke the handler.

handler

any

The function to handle the event. The function must accept a single parameter, which is an object literal. The type property on the parameter will match the eventType parameter passed to addHandlerAsync.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

function myHandlerFunction(eventarg) {
    if (eventarg.attachmentStatus === Office.MailboxEnums.AttachmentStatus.Added) {
        const attachment = eventarg.attachmentDetails;
        console.log("Event Fired and Attachment Added!");
        getAttachmentContentAsync(attachment.id, options, callback);
    }
}

Office.context.mailbox.item.addHandlerAsync(Office.EventType.AttachmentsChanged, myHandlerFunction, myCallback);

addHandlerAsync(eventType, handler, callback)

Adds an event handler for a supported event. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

addHandlerAsync(eventType: Office.EventType | string, handler: any, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

eventType

Office.EventType | string

The event that should invoke the handler.

handler

any

The function to handle the event. The function must accept a single parameter, which is an object literal. The type property on the parameter will match the eventType parameter passed to addHandlerAsync.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

addItemAttachmentAsync(itemId, attachmentName, options, callback)

Adds an Exchange item, such as a message, as an attachment to the message or appointment.

The addItemAttachmentAsync method attaches the item with the specified Exchange identifier to the item in the compose form. If you specify a callback function, the method is called with one parameter, asyncResult, which contains either the attachment identifier or a code that indicates any error that occurred while attaching the item. You can use the options parameter to pass state information to the callback function, if needed.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

If your Office Add-in is running in Outlook on the web, the addItemAttachmentAsync method can attach items to items other than the item that you are editing; however, this is not supported and is not recommended.

addItemAttachmentAsync(itemId: any, attachmentName: string, options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

itemId

any

The Exchange identifier of the item to attach. The maximum length is 100 characters.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If adding the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

Examples

// The following example adds an existing Outlook item as an attachment
// with the name `My Attachment`.
function callback(result) {
    if (result.error) {
        console.log(result.error);
    } else {
        console.log("Attachment added");
    }
}

function addAttachment() {
    // EWS ID of item to attach (shortened for readability).
    const itemId = "AAMkADI1...AAA=";

    // The values in asyncContext can be accessed in the callback.
    const options = { 'asyncContext': { var1: 1, var2: 2 } };

    Office.context.mailbox.item.addItemAttachmentAsync(itemId, "My Attachment", options, callback);
}
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
const attachmentItemId = $("#attachmentItemId").val();
Office.context.mailbox.item.addItemAttachmentAsync(
    attachmentItemId,
    "My attachment",
    { "asyncContext" : { var3: 3, var4: false } },
    function(result) { console.log(result); });

addItemAttachmentAsync(itemId, attachmentName, callback)

Adds an Exchange item, such as a message, as an attachment to the message or appointment.

The addItemAttachmentAsync method attaches the item with the specified Exchange identifier to the item in the compose form. If you specify a callback function, the method is called with one parameter, asyncResult, which contains either the attachment identifier or a code that indicates any error that occurred while attaching the item. You can use the options parameter to pass state information to the callback function, if needed.

You can subsequently use the identifier with the removeAttachmentAsync method to remove the attachment in the same session.

If your Office Add-in is running in Outlook on the web, the addItemAttachmentAsync method can attach items to items other than the item that you are editing; however, this is not supported and is not recommended.

addItemAttachmentAsync(itemId: any, attachmentName: string, callback?: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

itemId

any

The Exchange identifier of the item to attach. The maximum length is 100 characters.

attachmentName

string

The name of the attachment that is shown while the attachment is uploading. The maximum length is 255 characters.

callback

(asyncResult: Office.AsyncResult<string>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the attachment identifier will be provided in the asyncResult.value property. If adding the attachment fails, the asyncResult object will contain an Error object that provides a description of the error.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • NumberOfAttachmentsExceeded: The message or appointment has too many attachments.

close()

Closes the current item that is being composed

The behaviors of the close method depends on the current state of the item being composed. If the item has unsaved changes, the client prompts the user to save, discard, or close the action.

In the Outlook desktop client, if the message is an inline reply, the close method has no effect.

Note: In Outlook on the web, if the item is an appointment and it has previously been saved using saveAsync, the user is prompted to save, discard, or cancel even if no changes have occurred since the item was last saved.

close(): void;

Returns

void

Remarks

[ API set: Mailbox 1.3 ]

Minimum permission level: restricted

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/25-item-save-and-close/close.yaml
Office.context.mailbox.item.close();

disableClientSignatureAsync(options, callback)

Disables the Outlook client signature.

For Windows and Mac rich clients, this API sets the signature under the "New Message" and "Replies/Forwards" sections for the sending account to "(none)", effectively disabling the signature. For Outlook on the web, the API should disable the signature option for new mails, replies, and forwards. If the signature is selected, this API call should disable it.

disableClientSignatureAsync(options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/60-event-based-activation/work-with-client-signatures.yaml
// Disable the client signature.
Office.context.mailbox.item.disableClientSignatureAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("disableClientSignatureAsync succeeded");
  } else {
    console.error(asyncResult.error);
  }
});

disableClientSignatureAsync(callback)

Disables the Outlook client signature.

For Windows and Mac rich clients, this API sets the signature under the "New Message" and "Replies/Forwards" sections for the sending account to "(none)", effectively disabling the signature. For Outlook on the web, the API should disable the signature option for new mails, replies, and forwards. If the signature is selected, this API call should disable it.

disableClientSignatureAsync(callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

getAttachmentContentAsync(attachmentId, options, callback)

Gets an attachment from a message or appointment and returns it as an AttachmentContent object.

The getAttachmentContentAsync method gets the attachment with the specified identifier from the item. As a best practice, you should get the attachment's identifier from a getAttachmentsAsync call, then in the same session, use that identifier to retrieve the attachment. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

getAttachmentContentAsync(attachmentId: string, options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<AttachmentContent>) => void): void;

Parameters

attachmentId

string

The identifier of the attachment you want to get.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<Office.AttachmentContent>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object. If the call fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentTypeNotSupported: The attachment type isn't supported. Unsupported types include embedded images in Rich Text Format, or item attachment types other than email or calendar items (such as a contact or task item).

  • InvalidAttachmentId: The attachment identifier does not exist.

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/get-attachment-content.yaml
// Gets the attachments of the current message or appointment in compose mode.
const options = { asyncContext: { currentItem: item } };
// The getAttachmentsAsync call can only be used in compose mode.
item.getAttachmentsAsync(options, callback);

function callback(result) {
  if (result.status === Office.AsyncResultStatus.Failed) {
    console.log(result.error.message);
    return;
  }

  if (result.value.length <= 0) {
    console.log("Mail item has no attachments.");
    return;
  }

  for (let i = 0; i < result.value.length; i++) {
    // Log the attachment type and its contents to the console.
    result.asyncContext.currentItem.getAttachmentContentAsync(result.value[i].id, handleAttachmentsCallback);
  }
}

getAttachmentContentAsync(attachmentId, callback)

Gets an attachment from a message or appointment and returns it as an AttachmentContent object.

The getAttachmentContentAsync method gets the attachment with the specified identifier from the item. As a best practice, you should get the attachment's identifier from a getAttachmentsAsync call, then in the same session, use that identifier to retrieve the attachment. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

getAttachmentContentAsync(attachmentId: string, callback?: (asyncResult: Office.AsyncResult<AttachmentContent>) => void): void;

Parameters

attachmentId

string

The identifier of the attachment you want to get.

callback

(asyncResult: Office.AsyncResult<Office.AttachmentContent>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object. If the call fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Errors:

  • AttachmentTypeNotSupported: The attachment type isn't supported. Unsupported types include embedded images in Rich Text Format, or item attachment types other than email or calendar items (such as a contact or task item).

  • InvalidAttachmentId: The attachment identifier does not exist.

getAttachmentsAsync(options, callback)

Gets the item's attachments as an array.

getAttachmentsAsync(options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<AttachmentDetailsCompose[]>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<Office.AttachmentDetailsCompose[]>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. If the call fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
Office.context.mailbox.item.getAttachmentsAsync(function (result) {
    if (result.status !== Office.AsyncResultStatus.Succeeded) {
        console.error(result.error.message);
    } else {
        if (result.value.length > 0) {
            for (let i = 0; i < result.value.length; i++) {
                const attachment = result.value[i];
                console.log("ID: " + attachment.id + "\n" +
                    "Name: " + attachment.name + "\n" +
                    "Size: " + attachment.size + "\n" +
                    "isInline: " + attachment.isInline);
                switch (attachment.attachmentType) {
                    case Office.MailboxEnums.AttachmentType.Cloud:
                        console.log("Attachment type: Attachment is stored in a cloud location.");
                        break;
                    case Office.MailboxEnums.AttachmentType.File:
                        console.log("Attachment type: Attachment is a file.");
                        break;
                    case Office.MailboxEnums.AttachmentType.Item:
                        console.log("Attachment type: Attachment is an Exchange item.");
                        break;
                }
            }
        }
        else {
            console.log("No attachments on this message.");
        }
    }
});

getAttachmentsAsync(callback)

Gets the item's attachments as an array.

getAttachmentsAsync(callback?: (asyncResult: Office.AsyncResult<AttachmentDetailsCompose[]>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<Office.AttachmentDetailsCompose[]>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. If the call fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

getComposeTypeAsync(options, callback)

Specifies the type of message compose and its coercion type. The message can be new, or a reply or forward. The coercion type can be HTML or plain text.

getComposeTypeAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<any>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<any>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the asyncResult.value property contains an object with the item's compose type and coercion type.

Returns

void

An object with ComposeType and CoercionType enum values for the message item.

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

getComposeTypeAsync(callback)

Specifies the type of message compose and its coercion type. The message can be new, or a reply or forward. The coercion type can be HTML or plain text.

getComposeTypeAsync(callback: (asyncResult: Office.AsyncResult<any>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<any>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the asyncResult.value property contains an object with the item's compose type and coercion type.

Returns

void

An object with ComposeType and CoercionType enum values for the message item.

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/60-event-based-activation/work-with-client-signatures.yaml
// Get the compose type of the current message.
Office.context.mailbox.item.getComposeTypeAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log(
      "getComposeTypeAsync succeeded with composeType: " +
        asyncResult.value.composeType +
        " and coercionType: " +
        asyncResult.value.coercionType
    );
  } else {
    console.error(asyncResult.error);
  }
});

getInitializationContextAsync(options, callback)

Gets initialization data passed when the add-in is activated by an actionable message.

getInitializationContextAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the initialization context data is provided as a string (or an empty string if there's no initialization context) in the asyncResult.value property..

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Get the initialization context (if present).
Office.context.mailbox.item.getInitializationContextAsync((asyncResult) => {
    if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
        if (asyncResult.value.length > 0) {
            // The value is a string, parse to an object.
            const context = JSON.parse(asyncResult.value);
            // Do something with context.
        } else {
            // Empty context, treat as no context.
        }
    } else {
        // Handle the error.
    }
});

getInitializationContextAsync(callback)

Gets initialization data passed when the add-in is activated by an actionable message.

getInitializationContextAsync(callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. On success, the initialization context data is provided as a string (or an empty string if there's no initialization context) in the asyncResult.value property.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

getItemIdAsync(options, callback)

Asynchronously gets the ID of a saved item.

When invoked, this method returns the item ID via the callback function.

Note: If your add-in calls getItemIdAsync on an item in compose mode (e.g., to get an itemId to use with EWS or the REST API), be aware that when Outlook is in cached mode, it may take some time before the item is synced to the server. Until the item is synced, the itemId is not recognized and using it returns an error.

getItemIdAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Errors:

  • ItemNotSaved: The ID can't be retrieved until the item is saved.

getItemIdAsync(callback)

Asynchronously gets the ID of a saved item.

When invoked, this method returns the item ID via the callback function.

Note: If your add-in calls getItemIdAsync on an item in compose mode (e.g., to get an itemId to use with EWS or the REST API), be aware that when Outlook is in cached mode, it may take some time before the item is synced to the server. Until the item is synced, the itemId is not recognized and using it returns an error.

getItemIdAsync(callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Errors:

  • ItemNotSaved: The ID can't be retrieved until the item is saved.

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/85-tokens-and-service-calls/item-id-compose.yaml
Office.context.mailbox.item.getItemIdAsync(function (result) {
    if (result.status !== Office.AsyncResultStatus.Succeeded) {
        console.error(`getItemIdAsync failed with message: ${result.error.message}`);
    } else {
        console.log(result.value);
    }
});

getSelectedDataAsync(coercionType, options, callback)

Asynchronously returns selected data from the subject or body of a message.

If there is no selection but the cursor is in the body or subject, the method returns an empty string for the selected data. If a field other than the body or subject is selected, the method returns the InvalidSelection error.

To access the selected data from the callback function, call asyncResult.value.data. To access the source property that the selection comes from, call asyncResult.value.sourceProperty, which will be either body or subject.

getSelectedDataAsync(coercionType: Office.CoercionType | string, options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<any>) => void): void;

Parameters

coercionType

Office.CoercionType | string

Requests a format for the data. If Text, the method returns the plain text as a string, removing any HTML tags present. If Html, the method returns the selected text, whether it is plaintext or HTML.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<any>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

The selected data as a string with format determined by coercionType.

Remarks

[ API set: Mailbox 1.2 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Get selected data.
Office.initialize = function () {
    Office.context.mailbox.item.getSelectedDataAsync(Office.CoercionType.Text, {}, getCallback);
};

function getCallback(asyncResult) {
    const text = asyncResult.value.data;
    const prop = asyncResult.value.sourceProperty;

    console.log("Selected text in " + prop + ": " + text);
}

getSelectedDataAsync(coercionType, callback)

Asynchronously returns selected data from the subject or body of a message.

If there is no selection but the cursor is in the body or subject, the method returns an empty string for the selected data. If a field other than the body or subject is selected, the method returns the InvalidSelection error.

To access the selected data from the callback function, call asyncResult.value.data. To access the source property that the selection comes from, call asyncResult.value.sourceProperty, which will be either body or subject.

getSelectedDataAsync(coercionType: Office.CoercionType | string, callback: (asyncResult: Office.AsyncResult<any>) => void): void;

Parameters

coercionType

Office.CoercionType | string

Requests a format for the data. If Text, the method returns the plain text as a string, removing any HTML tags present. If Html, the method returns the selected text, whether it is plaintext or HTML.

callback

(asyncResult: Office.AsyncResult<any>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

The selected data as a string with format determined by coercionType.

Remarks

[ API set: Mailbox 1.2 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/20-item-body/get-selected-data.yaml
Office.context.mailbox.item.getSelectedDataAsync(Office.CoercionType.Text, function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    const text = asyncResult.value.data;
    const prop = asyncResult.value.sourceProperty;
    console.log("Selected text in " + prop + ": " + text);
  } else {
    console.error(asyncResult.error);
  }
});

getSharedPropertiesAsync(options, callback)

Gets the properties of an appointment or message in a shared folder or shared mailbox (now in preview).

For more information around using this API, see the shared folders and shared mailbox article.

Note: This method is not supported in Outlook on iOS or Android.

getSharedPropertiesAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<SharedProperties>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<Office.SharedProperties>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. The value property of the result is the properties of the shared item.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Important: In Message Compose mode, this API is not supported in Outlook on the web or on Windows unless the following conditions are met.

a. Delegate access/Shared folders

  1. The mailbox owner starts a message. This can be a new message, a reply, or a forward.

  2. They save the message then move it from their own Drafts folder to a folder shared with the delegate.

  3. The delegate opens the draft from the shared folder then continues composing.

b. Shared mailbox (applies to Outlook on Windows only)

  1. The shared mailbox user starts a message. This can be a new message, a reply, or a forward.

  2. They save the message then move it from their own Drafts folder to a folder in the shared mailbox.

  3. Another shared mailbox user opens the draft from the shared mailbox then continues composing.

The message is now in a shared context and add-ins that support these shared scenarios can get the item's shared properties. After the message has been sent, it's usually found in the sender's Sent Items folder.

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/65-delegates-and-shared-folders/get-shared-properties.yaml
if (!Office.context.mailbox.item.getSharedPropertiesAsync) {
  console.error("Try this sample on a message from a shared folder.");
  return;
}

Office.context.mailbox.getCallbackTokenAsync({ isRest: true }, function(result) {
  if (result.status === Office.AsyncResultStatus.Succeeded && result.value !== "") {
    Office.context.mailbox.item.getSharedPropertiesAsync(
      {
        // Pass auth token along.
        asyncContext: result.value
      },
      function(result2) {
        let sharedProperties = result2.value;
        let delegatePermissions = sharedProperties.delegatePermissions;

        // Determine if user has the appropriate permission to do the operation.
        if ((delegatePermissions & Office.MailboxEnums.DelegatePermissions.Read) != 0) {
          const ewsId = Office.context.mailbox.item.itemId;
          const restId = Office.context.mailbox.convertToRestId(ewsId, Office.MailboxEnums.RestVersion.v2_0);
          let rest_url =
            sharedProperties.targetRestUrl + "/v2.0/users/" + sharedProperties.targetMailbox + "/messages/" + restId;

          $.ajax({
            url: rest_url,
            dataType: "json",
            headers: { Authorization: "Bearer " + result2.asyncContext }
          })
            .done(function(response) {
              console.log(response);
            })
            .fail(function(error) {
              console.error(error);
            });
        }
      }
    );
  }
});

getSharedPropertiesAsync(callback)

Gets the properties of an appointment or message in a shared folder or shared mailbox (now in preview).

For more information around using this API, see the shared folders and shared mailbox article.

Note: This method is not supported in Outlook on iOS or Android.

getSharedPropertiesAsync(callback: (asyncResult: Office.AsyncResult<SharedProperties>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<Office.SharedProperties>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. The value property of the result is the properties of the shared item.

Returns

void

Remarks

[ API set: Mailbox 1.8 ]

Important: In Message Compose mode, this API is not supported in Outlook on the web or on Windows unless the following conditions are met.

a. Delegate access/Shared folders

  1. The mailbox owner starts a message. This can be a new message, a reply, or a forward.

  2. They save the message then move it from their own Drafts folder to a folder shared with the delegate.

  3. The delegate opens the draft from the shared folder then continues composing.

b. Shared mailbox (applies to Outlook on Windows only)

  1. The shared mailbox user starts a message. This can be a new message, a reply, or a forward.

  2. They save the message then move it from their own Drafts folder to a folder in the shared mailbox.

  3. Another shared mailbox user opens the draft from the shared mailbox then continues composing.

The message is now in a shared context and add-ins that support these shared scenarios can get the item's shared properties. After the message has been sent, it's usually found in the sender's Sent Items folder.

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/65-delegates-and-shared-folders/get-shared-properties.yaml
if (!Office.context.mailbox.item.getSharedPropertiesAsync) {
  console.error("Try this sample on an item from a shared folder.");
  return;
}

Office.context.mailbox.item.getSharedPropertiesAsync(function(result) {
  console.log(result.value);
});

isClientSignatureEnabledAsync(options, callback)

Gets if the client signature is enabled.

For Windows and Mac rich clients, the API call should return true if the default signature for new messages, replies, or forwards is set to a template for the sending Outlook account. For Outlook on the web, the API call should return true if the signature is enabled for compose types newMail, reply, or forward. If the settings are set to "(none)" in Mac or Windows rich clients or disabled in Outlook on the Web, the API call should return false.

isClientSignatureEnabledAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<boolean>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<boolean>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/60-event-based-activation/work-with-client-signatures.yaml
// Check if the client signature is currently enabled.
Office.context.mailbox.item.isClientSignatureEnabledAsync(function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("isClientSignatureEnabledAsync succeeded with result: " + asyncResult.value);
  } else {
    console.error(asyncResult.error);
  }
});

isClientSignatureEnabledAsync(callback)

Gets if the client signature is enabled.

For Windows and Mac rich clients, the API call should return true if the default signature for new messages, replies, or forwards is set to a template for the sending Outlook account. For Outlook on the web, the API call should return true if the signature is enabled for compose types newMail, reply, or forward. If the settings are set to "(none)" in Mac or Windows rich clients or disabled in Outlook on the Web, the API call should return false.

isClientSignatureEnabledAsync(callback: (asyncResult: Office.AsyncResult<boolean>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<boolean>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.10 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

loadCustomPropertiesAsync(callback, userContext)

Asynchronously loads custom properties for this add-in on the selected item.

Custom properties are stored as key-value pairs on a per-app, per-item basis. This method returns a CustomProperties object in the callback, which provides methods to access the custom properties specific to the current item and the current add-in. Custom properties aren't encrypted on the item, so this shouldn't be used as secure storage.

The custom properties are provided as a CustomProperties object in the asyncResult.value property. This object can be used to get, set, save, and remove custom properties from the mail item.

loadCustomPropertiesAsync(callback: (asyncResult: Office.AsyncResult<CustomProperties>) => void, userContext?: any): void;

Parameters

callback

(asyncResult: Office.AsyncResult<Office.CustomProperties>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

userContext

any

Optional. Developers can provide any object they wish to access in the callback function. This object can be accessed by the asyncResult.asyncContext property in the callback function.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

To learn more about custom properties, see Get and set add-in metadata for an Outlook add-in.

Minimum permission level: read item

Applicable Outlook mode: Message Compose

Examples

// The following example shows how to use the loadCustomPropertiesAsync method
// to asynchronously load custom properties that are specific to the current item.
// The example also shows how to use the saveAsync method to save these properties
// back to the server. After loading the custom properties, the example uses the
// get method to read the custom property myProp, the set method to write the
// custom property otherProp, and then finally calls the saveAsync method to save
// the custom properties.
Office.initialize = function () {
    // Checks for the DOM to load using the jQuery ready method.
    $(document).ready(function () {
        // After the DOM is loaded, add-in-specific code can run.
        const mailbox = Office.context.mailbox;
        mailbox.item.loadCustomPropertiesAsync(customPropsCallback);
    });
};

function customPropsCallback(asyncResult) {
    const customProps = asyncResult.value;
    const myProp = customProps.get("myProp");

    customProps.set("otherProp", "value");
    customProps.saveAsync(saveCallback);
}

function saveCallback(asyncResult) {
}
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/15-item-custom-properties/load-set-get-save.yaml
Office.context.mailbox.item.loadCustomPropertiesAsync(function (result) {
  if (result.status === Office.AsyncResultStatus.Succeeded) {
    console.log("Loaded following custom properties:");
    customProps = result.value;
    const dataKey = Object.keys(customProps)[0];
    const data = customProps[dataKey];
    for (let propertyName in data)
    {
      let propertyValue = data[propertyName];
      console.log(`${propertyName}: ${propertyValue}`);
    }              
  }
  else {
    console.error(`loadCustomPropertiesAsync failed with message ${result.error.message}`);
  }
});

removeAttachmentAsync(attachmentId, options, callback)

Removes an attachment from a message or appointment.

The removeAttachmentAsync method removes the attachment with the specified identifier from the item. As a best practice, you should use the attachment identifier to remove an attachment only if the same mail app has added that attachment in the same session. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

removeAttachmentAsync(attachmentId: string, options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

attachmentId

string

The identifier of the attachment to remove. The maximum string length of the attachmentId is 200 characters in Outlook on the web and on Windows.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. If removing the attachment fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.

Examples

// The following code removes an attachment with an identifier of '0'.
Office.context.mailbox.item.removeAttachmentAsync(
    '0',
    { asyncContext : null },
    function (asyncResult)
    {
        console.log(asyncResult.status);
    }
);
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
Office.context.mailbox.item.removeAttachmentAsync(
    $("#attachmentId").val(),
    { asyncContext : null },
    function(result)
    {
        if (result.status !== Office.AsyncResultStatus.Succeeded) {
            console.error(`${result.error.message}`);
        } else {
            console.log(`Attachment removed successfully.`);
        }
    }
);

removeAttachmentAsync(attachmentId, callback)

Removes an attachment from a message or appointment.

The removeAttachmentAsync method removes the attachment with the specified identifier from the item. As a best practice, you should use the attachment identifier to remove an attachment only if the same mail app has added that attachment in the same session. In Outlook on the web and mobile devices, the attachment identifier is valid only within the same session. A session is over when the user closes the app, or if the user starts composing an inline form then subsequently pops out the form to continue in a separate window.

removeAttachmentAsync(attachmentId: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

attachmentId

string

The identifier of the attachment to remove. The maximum string length of the attachmentId is 200 characters in Outlook on the web and on Windows.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult. If removing the attachment fails, the asyncResult.error property will contain an error code with the reason for the failure.

Returns

void

Remarks

[ API set: Mailbox 1.1 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.

removeHandlerAsync(eventType, options, callback)

Removes the event handlers for a supported event type. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

removeHandlerAsync(eventType: Office.EventType | string, options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

eventType

Office.EventType | string

The event that should revoke the handler.

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

removeHandlerAsync(eventType, callback)

Removes the event handlers for a supported event type. Note: Events are only available with task pane implementation.

For supported events, refer to the Item object model events section.

removeHandlerAsync(eventType: Office.EventType | string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

eventType

Office.EventType | string

The event that should revoke the handler.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter, asyncResult, which is an Office.AsyncResult object.

Returns

void

Remarks

[ API set: Mailbox 1.7 ]

Minimum permission level: read item

Applicable Outlook mode: Message Compose

saveAsync(options, callback)

Asynchronously saves an item.

When invoked, this method saves the current message as a draft and returns the item ID via the callback function. In Outlook on the web or Outlook in online mode, the item is saved to the server. In Outlook in cached mode, the item is saved to the local cache.

Since appointments have no draft state, if saveAsync is called on an appointment in compose mode, the item will be saved as a normal appointment on the user's calendar. For new appointments that have not been saved before, no invitation will be sent. Saving an existing appointment will send an update to added or removed attendees.

When working with HTML-formatted content, it's important to note that the Outlook client may modify the content. This means that subsequent calls to methods like Body.getAsync, Body.setAsync, and even saveAsync may not result in the same content.

Note: If your add-in calls saveAsync on an item in compose mode in order to get an item ID to use with EWS or the REST API, be aware that when Outlook is in cached mode, it may take some time before the item is actually synced to the server. Until the item is synced, using the itemId will return an error.

saveAsync(options: Office.AsyncContextOptions, callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

options
Office.AsyncContextOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function.

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.3 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.

saveAsync(callback)

Asynchronously saves an item.

When invoked, this method saves the current message as a draft and returns the item ID via the callback function. In Outlook on the web or Outlook in online mode, the item is saved to the server. In Outlook in cached mode, the item is saved to the local cache.

Since appointments have no draft state, if saveAsync is called on an appointment in compose mode, the item will be saved as a normal appointment on the user's calendar. For new appointments that have not been saved before, no invitation will be sent. Saving an existing appointment will send an update to added or removed attendees.

When working with HTML-formatted content, it's important to note that the Outlook client may modify the content. This means that subsequent calls to methods like Body.getAsync, Body.setAsync, and even saveAsync may not result in the same content.

Note: If your add-in calls saveAsync on an item in compose mode in order to get an item ID to use with EWS or the REST API, be aware that when Outlook is in cached mode, it may take some time before the item is actually synced to the server. Until the item is synced, using the itemId will return an error.

saveAsync(callback: (asyncResult: Office.AsyncResult<string>) => void): void;

Parameters

callback

(asyncResult: Office.AsyncResult<string>) => void

When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.3 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.

Examples

Office.context.mailbox.item.saveAsync(
    function callback(result) {
        // Process the result.
    });

// The following is an example of the
// `result` parameter passed to the
// callback function. The `value`
// property contains the item ID of
// the item.
{
    "value": "AAMkADI5...AAA=",
    "status": "succeeded"
}

setSelectedDataAsync(data, options, callback)

Asynchronously inserts data into the body or subject of a message.

The setSelectedDataAsync method inserts the specified string at the cursor location in the subject or body of the item, or, if text is selected in the editor, it replaces the selected text. If the cursor is not in the body or subject field, an error is returned. After insertion, the cursor is placed at the end of the inserted content.

setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

data

string

The data to be inserted. Data is not to exceed 1,000,000 characters. If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.

options

Office.AsyncContextOptions & Office.CoercionTypeOptions

An object literal that contains one or more of the following properties:- asyncContext: Developers can provide any object they wish to access in the callback function. coercionType: If text, the current style is applied in Outlook on the web and desktop clients. If the field is an HTML editor, only the text data is inserted, even if the data is HTML. If html and the field supports HTML (the subject doesn't), the current style is applied in Outlook on the web and the default style is applied in Outlook on desktop clients. If the field is a text field, an InvalidDataFormat error is returned. If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; if the field is text, then plain text is used.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.2 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.

Examples

Office.context.mailbox.item.setSelectedDataAsync("<b>Hello World!</b>", { coercionType : "html" });
Office.context.mailbox.item.setSelectedDataAsync("Hello World!");
// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/90-other-item-apis/set-selected-data.yaml
Office.context.mailbox.item.setSelectedDataAsync("Replaced", function(asyncResult) {
  if (asyncResult.status === Office.AsyncResultStatus.Succeeded) {
    console.log("Selected text has been updated successfully.");
  } else {
    console.error(asyncResult.error);
  }
});

setSelectedDataAsync(data, callback)

Asynchronously inserts data into the body or subject of a message.

The setSelectedDataAsync method inserts the specified string at the cursor location in the subject or body of the item, or, if text is selected in the editor, it replaces the selected text. If the cursor is not in the body or subject field, an error is returned. After insertion, the cursor is placed at the end of the inserted content.

setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;

Parameters

data

string

The data to be inserted. Data is not to exceed 1,000,000 characters. If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.

callback

(asyncResult: Office.AsyncResult<void>) => void

Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of type Office.AsyncResult.

Returns

void

Remarks

[ API set: Mailbox 1.2 ]

Minimum permission level: read/write item

Applicable Outlook mode: Message Compose

Errors:

  • InvalidAttachmentId: The attachment identifier does not exist.