How do I repair a corrupted Outlook?

[Bhand]

I just changed from cable internet connection to DSL high speed. When I set
up the new email, Outlook keeps asking for the Username and Password. I
spoke with AT&T tech support for a very long time and they finally told me I
have a corrupted Outlook. Because when I go on to their home page and type
in the email address and password it works. He said that should work in
Outlook as well, but it doesn't. Not sure what to do?

 

[BillR - MVP]

i seriously doubt it. Try removing the account and add it back from scratch.