Get system messages for Microsoft Teams

Article
11/07/2024

Microsoft Teams generates system messages for events by using the Microsoft Graph API. Events include members added to a chat, team name updated, and channel description updated. System messages enable the caller to have insights about events that happened in a team, a channel, or a chat.

Microsoft Graph exposes system messages as part of chatMessage GET operations and Change notifications for chat and channel messages.

System messages are presented as chatMessage objects. In this case, the messageType property is set to systemEventMessage and the eventDetail property provides the event details.

Supported GET operations

The following GET operations support system messages:

GET /teams/{team-id}/channels/{channel-id}/messages
GET /teams/{team-td}/channels/{channel-id}/messages/{message-id}
GET /chats/{chat-id}/messages
GET /chats/{chat-id}/messages/{message-id}

For details, see chatMessage.

Supported change notifications

The following change notifications support system messages:

Subscribe to messages in a channel - /teams/{team-id}/channels/{channel-id}/messages
Subscribe to messages in a chat - /chats/{chat-id}/messages

For details, see Change notifications for messages.

Supported system message events

Event	System message type	Applicable to
Call ended	callEndedEventMessageDetail	Chat, Channel
Call recording	callRecordingEventMessageDetail	Chat, Channel
Call started	callStartedEventMessageDetail	Chat, Channel
Call transcript	callTranscriptEventMessageDetail	Chat, Channel
Channel added	channelAddedEventMessageDetail	Team
Channel deleted	channelDeletedEventMessageDetail	Team
Channel description updated	channelDescriptionUpdatedEventMessageDetail	Channel
Channel renamed	channelRenamedEventMessageDetail	Channel
Channel set as favorite	channelSetAsFavoriteByDefaultEventMessageDetail	Channel
Channel shared	channelSharingUpdatedEventMessageDetail	Channel
Channel unset as favorite	channelUnsetAsFavoriteByDefaultEventMessageDetail	Channel
Chat renamed	chatRenamedEventMessageDetail	Chat
Conversation member role updated	conversationMemberRoleUpdatedEventMessageDetail	Channel, Team
Meeting policy updated	meetingPolicyUpdatedEventMessageDetail	Chat
Members added	membersAddedEventMessageDetail	Chat, Channel, Team
Members deleted	membersDeletedEventMessageDetail	Chat, Channel, Team
Members joined	membersJoinedEventMessageDetail	Chat
Members left	membersLeftEventMessageDetail	Chat
Message pinned	messagePinnedEventMessageDetail	Chat
Message unpinned	messageUnpinnedEventMessageDetail	Chat
Tab updated	tabUpdatedEventMessageDetail	Chat, Channel
Team archived	teamArchivedEventMessageDetail	Team
Team created	teamCreatedEventMessageDetail	Team
Team description updated	teamDescriptionUpdatedEventMessageDetail	Team
Team joining disabled	teamJoiningDisabledEventMessageDetail	Team
Team joining enabled	teamJoiningEnabledEventMessageDetail	Team
Team renamed	teamRenamedEventMessageDetail	Team
Teams app installed	teamsAppInstalledEventMessageDetail	Chat, Channel, Team
Teams app removed	teamsAppRemovedEventMessageDetail	Chat, Channel, Team
Teams app upgraded	teamsAppUpgradedEventMessageDetail	Chat, Channel, Team
Team unarchived	teamUnarchivedEventMessageDetail	Team

Note

System messages applicable to a team are posted in the primary channel.

JSON response examples

The following JSON examples show the responses for each supported event type.

Call ended

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.callEndedEventMessageDetail",
    "callId": "9c848c0e-f906-4dfc-b22e-c68a785a587c",
    "callDuration": "PT59S",
    "callEventType": "meeting",
    "callParticipants": [{
      "participant": {
        "application": null,
        "device": null,
        "user": {
          "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
          "displayName": "Adele Vance ",
          "userIdentityType": "aadUser"
        }
      }
    }],
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Call recording

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.callRecordingEventMessageDetail",
    "callId": "c86c6052-410b-4e7c-b843-9a09f576e4d5",
    "callRecordingDisplayName": "Meeting Recording.mp4",
    "callRecordingUrl": "https://testtenant.sharepoint.com/sites/TestTeam/Shared%20Documents/General/Recordings/Meeting%20Recording.mp4?web=1",
    "callRecordingDuration": "PT40M19.26S",
    "callRecordingStatus": "success",
    "meetingOrganizer": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    },
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Call started

{
  "id": "1615943825123",
  "replyToId": null,
  "etag": "1615943825123",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-1706:47:05.123Z",
  "lastModifiedDateTime": "2021-03-1706:47:05.123Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": "19:2da4c29f6d7041eca70b638b43d45437@thread.v2",
  "importance": "normal",
  "locale": "en-us",
  "webUrl": null,
  "channelIdentity": null,
  "onBehalfOf": null,
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.callStartedEventMessageDetail",
    "callId": "9c848c0e-f906-4dfc-b22e-c68a785a587c",
    "callEventType": "call",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Call transcript

{
  "id": "1615943825123",
  "replyToId": null,
  "etag": "1615943825123",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-1706:47:05.123Z",
  "lastModifiedDateTime": "2021-03-1706:47:05.123Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": "19:2da4c29f6d7041eca70b638b43d45437@thread.v2",
  "importance": "normal",
  "locale": "en-us",
  "webUrl": null,
  "channelIdentity": null,
  "onBehalfOf": null,
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.callTranscriptEventMessageDetail",
    "callId": "5b927778-760b-429e-8c4e-65b1802dd6c9",
    "callTranscriptICalUid": "040000008200E00074C5B7101A82E00800000000002C743F89CDD601000000000000000010000000CA87F90D9372ED45A399B5D75E854EE9 ",
    "meetingOrganizer": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel added

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelAddedEventMessageDetail",
    "channelId": "19:e84f079882f44fa8bebb7343b9e8921a@thread.tacv2",
    "channelDisplayName": "Standard channel",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel deleted

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelDeletedEventMessageDetail",
    "channelId": "19:914b8c83915548c0bff588e510a6cf01@thread.tacv2",
    "channelDisplayName": "Standard channel",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel description updated

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelDescriptionUpdatedEventMessageDetail",
    "channelId": "19:cb9c31f1c4c446fa820a64e07cacacc9@thread.tacv2",
    "channelDescription": "Channel description updated",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel renamed

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelRenamedEventMessageDetail",
    "channelId": "19:cb9c31f1c4c446fa820a64e07cacacc9@thread.tacv2",
    "channelDisplayName": "Standard channel rename",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "06a5b888-ad96-455e-88ef-c059ec4e4cf0",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel set as favorite by default

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelSetAsFavoriteByDefaultEventMessageDetail",
    "channelId": "19:cb9c31f1c4c446fa820a64e07cacacc9@thread.tacv2",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Channel shared

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelSharingUpdatedEventMessageDetail",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    },
    "sharedChannelId": "19:4a95f7d8db4c4e7fae857bce12345678@thread.tacv2",
    "ownerTeamId": "aef4bf47-16c8-47cf-b4a5-4b9b187c508b",
    "ownerTenantId": "eb564f47-16c8-47cf-b4a5-4b9b187c508b"
  }
}

Channel unset as favorite by default

{
  "id": "1616883610266",
  "replyToId": null,
  "etag": "1616883610266",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-03-28T03:50:10.266Z",
  "lastModifiedDateTime": "2021-03-28T03:50:10.266Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4a95f7d8db4c4e7fae857bcebe0623e6%40thread.tacv2/1616883610266?groupId=fbe2bf47-16c8-47cf-b4a5-4b9b187c508b&tenantId=2432b57b-0abd-43db-aa7b-16eadd115d34&createdTime=1616883610266&parentMessageId=1616883610266",
  "policyViolation": null,
  "from": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "fbe2bf47-16c8-47cf-b4a5-4b9b187c508b",
    "channelId": "19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.channelUnsetAsFavoriteByDefaultEventMessageDetail",
    "channelId": "19:cb9c31f1c4c446fa820a64e07cacacc9@thread.tacv2",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
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Chat renamed

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Conversation member role updated

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Meeting policy updated

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Members added

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Members deleted

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Members joined

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Members left

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Message pinned

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Message unpinned

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Tab updated

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Team archived

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Team created

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Team description updated

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Team joining disabled

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  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamJoiningDisabledEventMessageDetail",
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "9ee3dc1b-6a70-4582-8bc5-5dd35336b6c3",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Team joining enabled

{
  "id": "1618907417096",
  "replyToId": null,
  "etag": "1618907417096",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-04-20T08:30:17.096Z",
  "lastModifiedDateTime": "2021-04-20T08:30:17.096Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3Ad0891bf6638f48e8be186e2e92b4a554%40thread.tacv2/1618907417096?groupId=97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1618907417096&parentMessageId=1618907417096",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamJoiningEnabledEventMessageDetail",
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "9ee3dc1b-6a70-4582-8bc5-5dd35336b6c3",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Team renamed

{
  "id": "1618821548765",
  "replyToId": null,
  "etag": "1618821548765",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-04-19T08:39:08.765Z",
  "lastModifiedDateTime": "2021-04-19T08:39:08.765Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3Ad0891bf6638f48e8be186e2e92b4a554%40thread.tacv2/1618821548765?groupId=97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1618821548765&parentMessageId=1618821548765",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamRenamedEventMessageDetail",
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "teamDisplayName": "Team rename",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "9ee3dc1b-6a70-4582-8bc5-5dd35336b6c3",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Teams app installed

{
  "id": "1620046494994",
  "replyToId": null,
  "etag": "1620046494994",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-05-03T12:54:54.994Z",
  "lastModifiedDateTime": "2021-05-03T12:54:54.994Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3Ad0891bf6638f48e8be186e2e92b4a554%40thread.tacv2/1620046494994?groupId=97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1620046494994&parentMessageId=1620046494994",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamsAppInstalledEventMessageDetail",
    "teamsAppId": "aa5fe6c5-f91c-45ed-88de-640e235ad21b",
    "teamsAppDisplayName": "Flipgrid",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "06a5b888-ad96-455e-88ef-c059ec4e4cf0",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Teams app removed

{
  "id": "1620046597520",
  "replyToId": null,
  "etag": "1620046597520",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-05-03T12:56:37.52Z",
  "lastModifiedDateTime": "2021-05-03T12:56:37.52Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3Ad0891bf6638f48e8be186e2e92b4a554%40thread.tacv2/1620046597520?groupId=97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1620046597520&parentMessageId=1620046597520",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamsAppRemovedEventMessageDetail",
    "teamsAppId": "aa5fe6c5-f91c-45ed-88de-640e235ad21b",
    "teamsAppDisplayName": "Flipgrid",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "06a5b888-ad96-455e-88ef-c059ec4e4cf0",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Teams app upgraded

{
  "id": "1620046597520",
  "replyToId": null,
  "etag": "1620046597520",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-05-03T12:56:37.52Z",
  "lastModifiedDateTime": "2021-05-03T12:56:37.52Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3Ad0891bf6638f48e8be186e2e92b4a554%40thread.tacv2/1620046597520?groupId=97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1620046597520&parentMessageId=1620046597520",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "97a5ecc4-300b-4c5a-9f87-ca9a4969b3e0",
    "channelId": "19:d0891bf6638f48e8be186e2e92b4a554@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamsAppUpgradedEventMessageDetail",
    "teamsAppId": "aa5fe6c5-f91c-45ed-88de-640e235ad21b",
    "teamsAppDisplayName": "Flipgrid",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "06a5b888-ad96-455e-88ef-c059ec4e4cf0",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Team unarchived

{
  "id": "1623678060910",
  "replyToId": null,
  "etag": "1623678060910",
  "messageType": "systemEventMessage",
  "createdDateTime": "2021-06-14T13:41:00.91Z",
  "lastModifiedDateTime": "2021-06-14T13:41:00.91Z",
  "lastEditedDateTime": null,
  "deletedDateTime": null,
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A318c8c65f0794971a1a9b5e3413d77de%40thread.tacv2/1623678060910?groupId=5e91c375-f755-4882-880e-f1b9322faa87&tenantId=df81db53-c7e2-418a-8803-0e68d4b88607&createdTime=1623678060910&parentMessageId=1623678060910",
  "from": null,
  "policyViolation": null,
  "body": {
    "contentType": "html",
    "content": "<systemEventMessage/>"
  },
  "channelIdentity": {
    "teamId": "5e91c375-f755-4882-880e-f1b9322faa87",
    "channelId": "19:318c8c65f0794971a1a9b5e3413d77de@thread.tacv2"
  },
  "onBehalfOf": null,
  "attachments": [],
  "mentions": [],
  "reactions": [],
  "eventDetail": {
    "@odata.type": "#microsoft.graph.teamUnarchivedEventMessageDetail",
    "teamId": "5e91c375-f755-4882-880e-f1b9322faa87",
    "initiator": {
      "application": null,
      "device": null,
      "user": {
        "id": "1fb8890f-423e-4154-8fbf-db6809bc8756",
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }
}

Microsoft Teams API overview

Share via

Get system messages for Microsoft Teams

Supported GET operations

Supported change notifications

Supported system message events

JSON response examples

Call ended

Call recording

Call started

Call transcript

Channel added

Channel deleted

Channel description updated

Channel renamed

Channel set as favorite by default

Channel shared

Channel unset as favorite by default

Chat renamed

Conversation member role updated

Meeting policy updated

Members added

Members deleted

Members joined

Members left

Message pinned

Message unpinned

Tab updated

Team archived

Team created

Team description updated

Team joining disabled

Team joining enabled

Team renamed

Teams app installed

Teams app removed

Teams app upgraded

Team unarchived

Feedback

Additional resources

Share via

Get system messages for Microsoft Teams

Supported GET operations

Supported change notifications

Supported system message events

JSON response examples

Call ended

Call recording

Call started

Call transcript

Channel added

Channel deleted

Channel description updated

Channel renamed

Channel set as favorite by default

Channel shared

Channel unset as favorite by default

Chat renamed

Conversation member role updated

Meeting policy updated

Members added

Members deleted

Members joined

Members left

Message pinned

Message unpinned

Tab updated

Team archived

Team created

Team description updated

Team joining disabled

Team joining enabled

Team renamed

Teams app installed

Teams app removed

Teams app upgraded

Team unarchived

Related content

Feedback

Additional resources