Invite optional attendees
In outlook you can declare mandatory participants and optional participants. In Teams I cannot tag participants as optional. All become automagically mandatory.
CJ Best commented
This is especially an issue when you schedule the meeting in a channel. The organizer cannot update the meeting because technically the organizer is the channel, not the user who setup the meeting.
Jason Kilgrow commented
https://microsoftteams.uservoice.com/users/882854449-mark-pritchard : Nope. I just tried that. It only lets me remove the attendee.
Mark Pritchard commented
From my experience, once you have added your attendees if you go to "scheduling assistant" you can change the attendance requirements by clicking on the icon next to their check mark.