I don't know how attributable your problems are to Teams; what you're describing sounds more like a general problem of misunderstanding AzureAD. But maybe you'r

I don't know how attributable your problems are to Teams; what you're describing sounds more like a general problem of misunderstanding AzureAD. But maybe you're right; it can feel like everyone has to be in the tenant for things to work. Have had many problems with _EXT clients.