Outlook asking for domain username and password ever 2 minutes!

[Dukey]

We have a problem Outlook is asking for the users domain username and password every 2 minutes if i restart the server this sorts the problem out for about 2 days and then it comes back again, what could the problem be ive checked in event viewer for any errors but theres nothing. any ideas?

 

Thanks in advance

 

Dukey

[Dukey]

BUMP

[MatthewL]

I think we had something similar to this a while back and it was to do with Kerberos, I will see if I can find the fix we applied.