message: reply

Namespace: microsoft.graph

Reply to the sender of a message, add a comment or modify any updateable properties all in one reply call. The message is then saved in the Sent Items folder.

Alternatively, you can first create a draft reply message to include a comment or update any message properties, and then send the reply.


  • You can specify either a comment or the body property of the message parameter. Specifying both will return an HTTP 400 Bad Request error.
  • If the replyTo property is specified in the original message, per Internet Message Format (RFC 2822), you should send the reply to the recipients in replyTo and not the recipient in the from property.


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.Send
Delegated (personal Microsoft account) Mail.Send
Application Mail.Send

HTTP request

POST /me/messages/{id}/reply
POST /users/{id | userPrincipalName}/messages/{id}/reply
POST /me/mailFolders/{id}/messages/{id}/reply
POST /users/{id | userPrincipalName}/mailFolders/{id}/messages/{id}/reply

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, provide a JSON object with the following parameters.

Parameter Type Description
comment String A comment to include. Can be an empty string.
message message Any writeable properties to update in the reply message.


If successful, this method returns 202 Accepted response code. It does not return anything in the response body.


The following example includes a comment and adds a recipient to the reply message.


Here is an example of the request.

Content-Type: application/json

        "emailAddress": {
          "name":"Samantha Booth"
          "name":"Randi Welch"
  "comment": "Samantha, Randi, would you name the group please?" 

Here is an example of the response.

HTTP/1.1 202 Accepted