Update eventMessage

Namespace: microsoft.graph


APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.

Update the properties of an eventMessage object.


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

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Mail.ReadWrite
Delegated (personal Microsoft account) Mail.ReadWrite
Application Mail.ReadWrite

HTTP request

PATCH /me/messages/{id}
PATCH /users/{id | userPrincipalName}/messages/{id}

PATCH /me/mailFolders/{id}/messages/{id}
PATCH /users/{id | userPrincipalName}/mailFolders/{id}/messages/{id}

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 the values for relevant fields that should be updated. Existing properties that are not included in the request body will maintain their previous values or be recalculated based on changes to other property values. For best performance you shouldn't include existing values that haven't changed. Writable/Updatable properties are

Property Type Description
categories String The categories associated with the message.
importance String The importance of the message. Possible values are: Low, Normal, High.
isAllDay Boolean Indicates whether the event lasts the entire day. Adjusting this property requires adjusting the startDateTime and endDateTime properties of the event as well.
isDeliveryReceiptRequested Boolean Indicates whether a read receipt is requested for the message.
isRead Boolean Indicates whether the message has been read.
isReadReceiptRequested Boolean Indicates whether a read receipt is requested for the message.


If successful, this method returns a 200 OK response code and updated eventMessage object in the response body.



Here is an example of the request.

PATCH https://graph.microsoft.com/beta/me/messages/{id}
Content-type: application/json
Content-length: 248

  "isRead": "true",

Here is an example of the response. Note: The response object shown here may be truncated for brevity. All of the properties will be returned from an actual call.

HTTP/1.1 200 OK
Content-type: application/json
Content-length: 248

  "receivedDateTime": "2016-10-19T10:37:00Z",
  "sentDateTime": "2016-10-19T10:37:00Z",
  "hasAttachments": true,
  "subject": "subject-value",
  "body": {
    "contentType": "",
    "content": "content-value"
  "bodyPreview": "bodyPreview-value",
  "meetingMessageType": "meetingMessageType-value"