| Property Name | Type | Description | Available Version |
|---|---|---|---|
| activityDate | Datetime | Direct message member activity date. | 40.0 |
| actor | ConnectApi.UserSummary | User who changed the direct message membership. | 40.0 |
| membersAdded | ConnectApi.DirectMessageMemberPage | Members added to the direct message as part of the activity. | 40.0 |
| membersRemoved | ConnectApi.DirectMessageMemberPage | Members removed from the direct message as part of the activity. | 40.0 |