[GCSMan]

XP - SP3. OWA to the office worked fine. No changes that I can remember were made. Trying to access OWA gives the login box which I answer correctly. Click OK and I am returned to the same box with this message in the top: -
"The server my.office.co.uk at unspecified requires a username and password"
I have replaced the real address with my.office - have cleared all cache, history etc but no change. Can log in ok from another PC.

Have run spybot S&D
Upgraded to IE8 from IE7 no difference.
Have installed Google chrome - no difference.
My firewall has the same rules for the pc that fails and the one that works.
Have deleted all cert’s

I am guessing it must be some certificate thing somewhere but I can' find it.

Any help would be appreciated.

GCSMan