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Add support for add-in commands in Outlook on mobile devices

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Using add-in commands in Outlook on mobile devices allows your users to access the same functionality (with some limitations) that they already have in Outlook on the web, on Windows (new and classic), and on Mac. Adding support for Outlook mobile requires updating the add-in manifest and possibly changing your code for mobile scenarios.

Update the manifest

The first step to enabling add-in commands in Outlook mobile is to define them in the add-in manifest.

  1. In the "extensions.ribbons.requirements.formFactors" array, add "mobile" as an item. When you are finished, the array should look like the following.

    "formFactors": [
    "mobile",
    <!-- Typically, there'll be other form factors listed. -->
]

  2. If your add-in uses Appointment Attendee mode, such as an add-in that integrates a provider of a note-taking or customer relationship management (CRM) application, add "logEventMeetingDetailsAttendee" to the "extensions.ribbons.contexts" array. The following is an example.

    "contexts": [
    "meetingDetailsAttendee",
    "logEventMeetingDetailsAttendee"
],

  3. If your add-in uses an integrated online meeting provider, add "onlineMeetingDetailsOrganizer" to the "extensions.ribbons.contexts" array. The following is an example.

    "contexts": [
    "meetingDetailsOrganizer",
    "onlineMeetingDetailsOrganizer"
],

  4. In the "extensions.ribbons.tabs" array, find the tab with the "builtInTabId" of "TabDefault". Add a child "customMobileRibbonGroups" array to it (as a peer of the existing "groups" property). Inside this array, create an object and do the following:

    • Set appropriate "id" and "label" values.
    • Create an object in the "controls" array to represent a button and configure it as follows.
      • Set appropriate "id" and "label" values. To ensure that the button fits correctly in the ribbon, we recommend that you limit the "label" to 16 characters.
      • Set "type" to "mobileButton".
      • Assign a function to the "actionId" property. This should match the "id" of the object in the "extensions.runtimes.actions" array.
      • Be sure you have all nine required icons.

    The following is an example.

    "tabs": [
    {
        "builtInTabId": "TabDefault",
        "groups": [
            <-- Non-mobile group objects omitted. -->
        ],
        "customMobileRibbonGroups": [
            {
                "id": "mobileApptComposeGroup",
                "label": "Contoso Meeting",
                "controls": [
                    { 
                        "id": "mobileInsertMeetingButton",
                        "label": "Add meeting",
                        "type": "mobileButton",
                        "actionId": "insertContosoMeeting",
                        "icons": [
                            {
                                "scale": 1,
                                "size": 25,
                                "url": "https://contoso.com/assets/icon-25.png"
                            },
                            {
                                "scale": 1,
                                "size": 32,
                                "url": "https://contoso.com/assets/icon-32.png"
                            },
                            {
                                "scale": 1,
                                "size": 48,
                                "url": "https://contoso.com/assets/icon-48.png"
                            },                                
                            {
                                "scale": 2,
                                "size": 25,
                                "url": "https://contoso.com/assets/icon-25.png"
                            },
                            {
                                "scale": 2,
                                "size": 32,
                                "url": "https://contoso.com/assets/icon-32.png"
                            },
                            {
                                "scale": 2,
                                "size": 48,
                                "url": "https://contoso.com/assets/icon-48.png"
                            },                                
                            {
                                "scale": 3,
                                "size": 25,
                                "url": "https://contoso.com/assets/icon-25.png"
                            },
                            {
                                "scale": 3,
                                "size": 32,
                                "url": "https://contoso.com/assets/icon-32.png"
                            },
                            {
                                "scale": 3,
                                "size": 48,
                                "url": "https://contoso.com/assets/icon-48.png"
                            }
                        ]
                    }
                ]
            }
        ]
    }
]

Code considerations

Designing an add-in for mobile introduces some additional considerations.

Use Microsoft Graph

Add-ins should prefer to get information from the Office.js API when possible. If your add-in requires information not exposed by the Office.js API, use Microsoft Graph to access the user's mailbox.

Pinch zoom

By default users can use the "pinch zoom" gesture to zoom in on task panes. If this doesn't make sense for your scenario, be sure to disable pinch zoom in your HTML.

Close task panes

In Outlook mobile, task panes take up the entire screen and by default require the user to close them to return to the message. Consider using the Office.context.ui.closeContainer method to close the task pane when your scenario is complete.

Compose mode and appointments

Currently, add-ins in Outlook mobile only support activation when reading messages. Add-ins aren't activated when composing messages or when viewing or composing appointments. However, there are some exceptions.

  1. Online meeting provider integrated add-ins activate in Appointment Organizer mode. For more information about this exception (including available APIs), see Create an Outlook mobile add-in for an online-meeting provider.
  2. Add-ins that log appointment notes and other details to customer relationship management (CRM) or note-taking services activate in Appointment Attendee mode. For more information about this exception (including available APIs), see Log appointment notes to an external application in Outlook mobile add-ins.
  3. Event-based add-ins activate when the OnNewMessageCompose event occurs. For more information about this exception (including additional supported APIs), see Implement event-based activation in Outlook mobile add-ins.

Supported APIs

Although Outlook mobile supports up to Mailbox requirement set 1.5, you can now implement additional APIs from later requirement sets to further extend the capability of your add-in on Outlook mobile. For guidance on which APIs you can implement in your mobile add-in, see Outlook JavaScript APIs supported in Outlook on mobile devices.

See also