Hi, 

I use Outlook for Mac 2011 and has always worked fine with the Exchange server. Out of the blue, last week it started to show an error message thaw says "Mail could not be received at this time" and asks me to retype the username/password. When I do, it connects, starts downloading a few messages and, after 2 or 3 seconds asks again and again and again. It only happens  when I connect on a different network. If I use the same Exchange server network it works fine.

I've read that I could delete, on keychain, the respective application password. Didn't work for me.

Does anyone have a magic trick?

Tks ...