participant: mute

Namespace: microsoft.graph

Mute a specific participant in the call.

This is a server mute, meaning that the server will drop all audio packets for this participant, even if the participant continues to stream audio.

For more information about how to handle mute operations, see muteParticipantOperation.

Note: This method is only supported for group calls.

This API is available in the following national cloud deployments.

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


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) Not supported. Not supported.
Delegated (personal Microsoft account) Not supported. Not supported.
Application Calls.JoinGroupCall.All Calls.JoinGroupCallasGuest.All

HTTP request

POST /communications/calls/{id}/participants/{id}/mute

Request headers

Name Description
Authorization Bearer {token}. Required.
Content-type application/json. Required.

Request body

In the request body, provide a JSON object with the following parameters.

Parameter Type Description
clientContext String Unique Client Context string. Max limit is 256 chars.


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

Note: When this API returns a successful response, all participants will receive a roster update.

Example - Mute specific participant

The following example shows how to call this API.


The following example shows the request.

Content-Type: application/json

  "clientContext": "d45324c1-fcb5-430a-902c-f20af696537c"

Note: The response object shown here might be shortened for readability.

HTTP/1.1 200 OK
Content-Type: application/json

  "@odata.type": "#microsoft.graph.muteParticipantOperation",
  "@odata.context": "$metadata#muteParticipantOperation",
  "id": "17e3b46c-f61d-4f4d-9635-c626ef18e6ad",
  "status": "completed",
  "clientContext": "d45324c1-fcb5-430a-902c-f20af696537c"
Notification - roster updated with participant muted
Content-Type: application/json
  "@odata.type": "#microsoft.graph.commsNotifications",
  "value": [
      "@odata.type": "#microsoft.graph.commsNotification",
      "changeType": "updated",
      "resourceUrl": "/communications/calls/57dab8b1-894c-409a-b240-bd8beae78896/participants",
      "resourceData": [
          "@odata.type": "#microsoft.graph.participant",
          "id": "2765eb15-01f8-47c6-b12b-c32111a4a86f",
          "info": {
            "identity": {
              "user": {
                "displayName": "Bob",
                "id": "5810cede-f3cc-42eb-b2c1-e9bd5d53ec96"
            "region": "westus",
            "languageId": "en-US"
          "mediaStreams": [
              "mediaType": "audio",
              "label": "main-audio",
              "sourceId": "1",
              "direction": "sendReceive"
          "isMuted": true, // will be set to true on mute
          "isInLobby": false