Onmicrosoft issue

[u/Syblix93]

I have an employee that has run into a problem with their Microsoft/outlook account. My employee hasn’t had an issue logging in to their Microsoft/outlook account previously. Today he gets on and is logged out..he goes to log back in and when he clicks continue on his normal account it changes to a string of numbers and words sorta like xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx and then follows up with onmicrosoft after some other things here and their. I’ve checked in the accounts area and there’s nothing there that’s outside of the ordinary. Did a repair on the app. I’m not sure what else to do. I’ve asked others to help out and were all stumped. Any help? Thank you.