Just upgraded one site to SBS2011 a month ago, all seem ok, but yesterday, one user (out of 30) can't connect to the Exchange, Outlook 2007 just loops with 'Trying to retrieve', in the end, I reinstalled Office, reset the LAN, then after 30 mins, all worked again.
This morning, same thing happend, this time, I checked the users OWA, and I get this :
An error occurred and your request couldn't be completed. If the problem continues, contact your helpdesk with this HTTP Status code: 500.
User host address: 81.xxx.164.xxx
User: Paul Xxxx
EX Address: /o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recip
SMTP Address: firstname.lastname@example.org
OWA version: 188.8.131.52
Exception type: System.Web.HttpException
Exception message: Request timed out.
No callstack available
So I know the problem is from the Exchange rather than local.
Looking at the EV, I can't see anything wrong.
All the other users seem to work fine, if I OWA to all other users, they all connect first time, I tried to restart the Exchange Form Based Authentication, it made the login screen slightly faster but same error for this user.
Any experts know what can cause this ? or know how to fix it ?