I thought I would share this to spare others the frustration...

In the vain hope that ActiveSync 4.5 would resolve intermittent connection problems between my PPC-6700 and desktop, I downloaded it and installed it yesterday. After re-pairing the device, everything worked as before (including the intermittent connection problem which is alive and well), except for my Exchange Server synchronization. What I got was "The server could not be reached. This can be caused by temporary network conditions." and "Support Code: 85002003".

It turns out that ActiveSync 4.5 doesn't properly detect the network state. Under "File | Connection Settings...", set "This computer is connected to:" to "The Internet" rather than "Automatic".

Damn! I've been fighting that for hours. I'd literally solved it five minutes before reading this via the connection settings change you suggested.

Moderators would you please consider adding "85002003" to the title?

This is a big issue.
Todd/Indy

EDIT: I'm syncing to my own exchange server.