membersAddedEventMessageDetail resource type

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.

Represents the details of an event message about members added. This message is generated when members are added to a chat, a channel, or a team. The visibleHistoryStartDateTime property for a members added event in a channel is always set to 0001-01-01T00:00:00Z, which indicates that all history is shared.

Note: For a chat, when the selected share history time for members is earlier than the initator's visible history time, the visibleHistoryStartDateTime property for conversationMember and the membersAddedEventMessageDetail message might have different values. conversationMember has the effective visible history time for the member based on initiator's visible history time.

Inherits from eventMessageDetail.


Property Type Description
initiator identitySet Initiator of the event.
members teamworkUserIdentity collection List of members added.
visibleHistoryStartDateTime DateTimeOffset The timestamp denoting how far back a conversation's history is shared with the conversation members.

JSON representation

The following is a JSON representation of the resource.

  "@odata.type": "#microsoft.graph.membersAddedEventMessageDetail",
  "members": [
      "@odata.type": "microsoft.graph.teamworkUserIdentity"
  "initiator": {
    "@odata.type": "microsoft.graph.identitySet"
  "visibleHistoryStartDateTime": "String (timestamp)"

See also