I sync wirelessly with my company's Exchange server. Most of the time, it works. Every third or fourth time (approximately), however, I get a "500 Server Error" when I attempt to sync. The server's up and responding to the PC outlook client-- does anybody know what sort of server config could cause this issue?

AirSAMStateMachine.c
2292 1 HTTP/1.1 500
Internal Server Error Date: Wed, 25 Oct 2006
02:23:20 GMT Server:
Microsoft-IIS/6.0 X-Powered-B

The versamail error code is "1", which is incredibly unhelpful. That translates to "still processing." Any exchange config advice is welcome.