I have a few times now experienced ‘lost’ Teams invitations. I think the common denominator has been using the people’s Observable ID (which seems to get lost) versus typing in their actual email. Maybe it’s something you’d like to look at?
We currently only support inviting by email. If you type someone’s Observable login into the invite box you should seen an error like this:
1 invitation failed: notavalidemail
Are you seeing that? It’s perhaps easy to miss. We do want to support inviting by login in the future, though!
Let me see if I see! Will respond soon.