I'm currently dealing with a customer who's work 365 account has been setup as a personal account, as opposed to a work or school account. When I login with the credentials to Office.com, it asks to choose between work or school or personal. When I choose personal, the credentials will work. If I choose work or school, they wont. If I try to add his email account into Outlook for Mac, the credentials will not go through.
I think this may be because Outlook isn't asking for personal/work or school, any advise is welcome.