Add attachment

• 2/22/2020
• 3 minutes to read
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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.

Permissions

One of the following permissions is required to call this API. To learn more, including how to choose permissions, see Permissions.

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

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

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
Content-length: 151

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

GraphServiceClient graphClient = new GraphServiceClient( authProvider );

var attachment = new FileAttachment
{
	Name = "menu.txt",
	ContentBytes = "base64bWFjIGFuZCBjaGVlc2UgdG9kYXk="
};

await graphClient.Me.Events["AAMkAGI1AAAt9AHjAAA="].Attachments
	.Request()
	.AddAsync(attachment);

const options = {
	authProvider,
};

const client = Client.init(options);

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

let res = await client.api('/me/events/AAMkAGI1AAAt9AHjAAA=/attachments')
	.post(attachment);

MSHTTPClient *httpClient = [MSClientFactory createHTTPClientWithAuthenticationProvider:authenticationProvider];

NSString *MSGraphBaseURL = @"https://graph.microsoft.com/v1.0/";
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[MSGraphBaseURL stringByAppendingString:@"/me/events/AAMkAGI1AAAt9AHjAAA=/attachments"]]];
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

MSGraphAttachment *attachment = [[MSGraphAttachment alloc] init];
[attachment setName:@"menu.txt"];
[attachment setContentBytes:@"base64bWFjIGFuZCBjaGVlc2UgdG9kYXk="];

NSError *error;
NSData *attachmentData = [attachment getSerializedDataWithError:&error];
[urlRequest setHTTPBody:attachmentData];

MSURLSessionDataTask *meDataTask = [httpClient dataTaskWithRequest:urlRequest 
	completionHandler: ^(NSData *data, NSURLResponse *response, NSError *nserror) {

		//Request Completed

}];

[meDataTask execute];

IGraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider( authProvider ).buildClient();

FileAttachment attachment = new FileAttachment();
attachment.name = "menu.txt";
attachment.contentBytes = "base64bWFjIGFuZCBjaGVlc2UgdG9kYXk=";

graphClient.me().events("AAMkAGI1AAAt9AHjAAA=").attachments()
	.buildRequest()
	.post(attachment);

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
Content-length: 600

{
  "@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
Content-length: 162

{
    "@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
}