Outlook.com credential's?


New Email
Hi all, my Outlook.com has suddenly stopped working, I have received a message stating that I need to update my credentials thus:
Select Sync email to see your Connected accounts.
• Check the details for the connected account that's stopped working and correct the problem.

I have done this but I don't know what I'm looking at...I don't know how to 'correct the problem'....any help appreciated.