The other thing that sucks about Azure AD and Teams is that if you invite someone from outside your tenant into a meeting and their IT admin has disabled guest login into other tenants (not uncommon in places like banks where they don’t want people leaving credentials everywhere, even if heavily scoped), they will get a cryptic error message and you will never know that they got an error unless they call you out of band and tell you, and by that point you’re probably 15 minutes into the meeting.

This was the reason the last place I worked switched to Zoom, since if you invited someone outside the org it just popped up a box asking them for a name.