When trying the new outlook for windows app, it starts the sign in process but gets an error "We couldn't find a work or school account with that email address". This is my personal PC but I may have signed into work at some point with it. I've checked Settings - Accounts - Access work or school and there is no account connected there.
Not sure if its related but I had a problem with Teams in that is would hang when starting but I removed the app and reinstalled and it works fine now.