New Teams Channel Calendar App Makes Channel Meetings Easier to Access

JAM313 Get an administrator to run the following command against your Microsoft Group

Set-UnifiedGroup -Identity "[Group Name]" -AlwaysSubscribeMembersToCalendarEvents:$false -UnifiedGroupWelcomeMessageEnabled:$false

AFter executing this command, any new member added to the team will not be subscribed to event notifications. This is what you want. Then you can remove each member previously added to the team and immediately add them back to the team. Now, none of those members will receive the notifications.

That leaves guest users. They will always receive meeting notifications. I have not yet figured out a way to suppress these notifications. I setup a Guest channel and a #guests tag to communicate with these members. I teach them to simply decline invitations from the team when they are listed as optional on the invitation. This has worked well and we have dramatically increased the number of channel meetings that we use. 

The big advantage is keep a team aware of what is going on so that people can join meetings that they were not explicitly invited to. They may have something important to add, or something important to gain from attending.