I had a weird problem. I use the nokia E75 to synchronize my Exchange Account.
At once i got a message that the Exchange server did not respond. However, My email was synchronized. The logfiles mentioned error 500 (internal server error).
Our helpdesk couldn't find anything at the serverside.
At the telephone even a hardware reset did not change the problem.
This morning, studying some settings in Exchange, I changed my language at the E75 to English (from Dutch). I changed the synchronisation settings and I was glad to find out that this synchronisation worked fine.
Putting the language back to Dutch caused no problem. So: Problem solved.
However, I have the Idea that somewhere in ActiveSync the wrong term was sent to the Exchange server.
Does somebody else know this problem?