Add attachment

Namespace: microsoft.graph

Use this API to add an attachment to an existing event. This operation limits the size of the attachment you can add to under 3 MB.

If an organizer adds an attachment to a meeting event, the organizer can subsequently update the event to send the attachment and update the event for each attendee as well.

This API is available in the following national cloud deployments.

Global service US Government L4 US Government L5 (DOD) China operated by 21Vianet

Permissions

Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.

Permission type Least privileged permissions Higher privileged permissions
Delegated (work or school account) Calendars.ReadWrite Not available.
Delegated (personal Microsoft account) Calendars.ReadWrite Not available.
Application Calendars.ReadWrite Not available.

HTTP request

Attachments for an event in the user's default calendar.

POST /me/events/{id}/attachments
POST /users/{id | userPrincipalName}/events/{id}/attachments

POST /me/calendar/events/{id}/attachments
POST /users/{id | userPrincipalName}/calendar/events/{id}/attachments

Attachments for an event in a calendar belonging to the user's default calendarGroup.

POST /me/calendars/{id}/events/{id}/attachments
POST /users/{id | userPrincipalName}/calendars/{id}/events/{id}/attachments

Attachments for an event in a calendar belonging to a user's calendarGroup.

POST /me/calendarGroups/{id}/calendars/{id}/events/{id}/attachments
POST /users/{id | userPrincipalName}/calendarGroups/{id}/calendars/{id}/events/{id}/attachments

Request headers

Name Type Description
Authorization string Bearer {token}. Required.
Content-Type string Nature of the data in the body of an entity. Required.

Request body

In the request body, supply a JSON representation of attachment object.

Response

If successful, this method returns 201 Created response code and attachment object in the response body.

Example (file attachment)

Request

Here is an example of the request.

POST https://graph.microsoft.com/v1.0/me/events/AAMkAGI1AAAt9AHjAAA=/attachments
Content-type: application/json

{
    "@odata.type": "#microsoft.graph.fileAttachment",
    "name": "menu.txt",
    "contentBytes": "base64bWFjIGFuZCBjaGVlc2UgdG9kYXk="   
}

In the request body, supply a JSON representation of attachment object.

Response

Here is an example of the response.

HTTP 201 Created
Content-type: application/json

{
    "@odata.context":"https://graph.microsoft.com/v1.0/$metadata#users('cd209b0b-3f83-4c35-82d2-d88a61820480')/events('AAMkAGI1AAAt9AHjAAA%3D')/attachments/$entity",
    "@odata.type":"#microsoft.graph.fileAttachment",
    "id":"AAMkAGI1AAAt9AHjAAABEgAQAEdBogju-MJEu6Ngg-1_W0g=",
    "lastModifiedDateTime":"2017-04-15T03:21:49Z",
    "name":"menu.txt",
    "contentType":"text/plain",
    "size":178,
    "isInline":false,
    "contentId":null,
    "contentLocation":null,
    "contentBytes":"bWFjIGFuZCBjaGVlc2UgdG9kYXk="
}

Example (item attachment)

Request

Here is an example which attaches an event with another event as an item attachment.

POST https://graph.microsoft.com/v1.0/me/events/AAMkAGI1AAAt9AHjAAA=/attachments
Content-type: application/json

{
  "@odata.type": "#microsoft.graph.itemAttachment",
  "name": "Holiday event", 
  "item": {
        "@odata.type": "microsoft.graph.event",
        "subject": "Discuss gifts for children",
        "body": {
            "contentType": "HTML",
            "content": "Let's look for funding!"
         },
         "start": {
             "dateTime": "2016-12-02T18:00:00",
             "timeZone": "Pacific Standard Time"
          },
          "end": {
             "dateTime": "2016-12-02T19:00:00",
             "timeZone": "Pacific Standard Time"
          }
    }
}
Response

Here is an example of the response.

HTTP 201 Created
Content-type: application/json

{
    "@odata.context":"https://graph.microsoft.com/v1.0/$metadata#me/events('AAMkAGI1AAAt9AHjAAA=')/attachments/$entity",
    "@odata.type":"#microsoft.graph.itemAttachment",
    "@odata.id":"https://graph.microsoft.com/v1.0/users('fdcbcf34-2505-4d07-be5b-0a55b699d157@41a5b830-45ac-4f1b-9bfc-baafa3b7db2e')/events('AAMkAGI1AAAt9AHjAAA=')/attachments('AAMkADNkN2Jp5JVnQIe9r0=')",
    "id":"AAMkADNkNJp5JVnQIe9r0=",
    "lastModifiedDateTime":"2016-12-01T22:27:13Z",
    "name":"Holiday event",
    "contentType":null,
    "size":2473,
    "isInline":false
}