Can't use my "Work" account in teams

Every time I try to use my "Work" account to log back into Teams, it doesn't seem to work. Even when logging into Microsoft, the login doesn't work. 

The issue is that I changed my domain to a new one, so I can't reset the password. But still I can log into my "Private" account. Is there something I need to active inside of Microsoft to make the "Work" account accessible again?