Meeting Room resource displays as "Unknown User" in meeting chat

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New Contributor

I've noticed that in a meeting that has a room reservation, the room gets added to the meeting chat, and is displayed as "Unknown User". This can be very disconcerting for the other participants, particularly during confidential meetings.

Repro:

  1. Schedule a Teams meeting, and add a room resource.
  2. Open the meeting in the Teams app, and open Chat with participants.

Results:

  1. Hover over participants at the top of the chat window:
    1. Number of participants includes the room.
    2. Room is listed as "Unknown User".
  2. Chat message: "<room name> joined the conversation."
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