@jhubbard Agree about the private channels, MS could have done way better. I only mentioned it because what @garyang said in his message did not make sense about having a channel with 20 people (Team channel with 20 people and I want to invite 10 one-time guests to this meeting.) Unless he meant a Team with 20 people. Again agree about the "private" meeting. An update is coming out where you can actually invite a team to a meeting so this would be great for his scenario. Create the meeting in Outlook using my hack, invite the "Team" and the 10 guests.