I have a meeting / Demo session with 200 people every second week. I have found, that it is a bit difficult to maintain mailing list for such a big group and tried to solve this problem with MS Group option and now with Teams without any good results.
Problem is, that if someone leaves the team, I am not able easily remove this person from upcoming meetings. The invitation remains in this person's calendar. Also adding new members to the team, not really updating the upcoming invitations.