The issue with Teams is the issue all modern Microsoft services have: Their account systems are really confusing, and they actively make it worse in the UI. I

The issue with Teams is the issue all modern Microsoft services have: Their account systems are really confusing, and they actively make it worse in the UI. I have 4 different accounts that have access to different Teams instances. They all have my full name, and therefore the same initials. There is no way to tell which account you are logged in as, in the UI. A couple of months ago, they finally fixed the "log out and log in as a different user" flow so it actually did something for me. Before that, it would log out, and then just automatically log back in as the same user. You can't (as far as I can tell) run two instances as different users at the same time. I join most Teams meetings as "guest" on my phone. That works OK, but it doesn't really say much good about the Windows app.