microsoft-graph-apioffice365office365apioffice365-exchange

Does `/messages` in Graph API include shared mailboxes?

I'm calling https://graph.microsoft.com/v1.0/users/{user_id}/messages/ to paginate through all user messages. I'm using app permissions for access, which works fine.

But I'm getting more messages than expected, and I'm not sure why. Is it possible the /messages endpoint includes messages from shared mailboxes available to user_id, too?

If so, what is the way to suppress that? Thanks.

Solution

  • From Microsoft's Known Issues page:

    GET messages returns chats in Microsoft Teams

    In both the v1 and beta endpoints, the response of GET /users/id/messages includes the user's Microsoft Teams chats that occurred outside the scope of a team or channel. These chat messages have "IM" as their subject.

    So the solution is to ignore all messages with subject == "IM".