[georgeIII]

Bes 4.0 for exchange 2003. The wireless synchronization is enabled on the blackberry manager properties, on the user´s properties and on the handhelds, but bidirectional synchronization fails.

Thank you people.

[akdumga]

Are you seeing one-way synchronization or no synchronization at all? If only one way, is it just the calendar, or other items as well?

Some things to check:

Sync service running (all PIM stuff, not email or cal)
Correct MAPI32.DLL and CDO.DLL on BES (this can effect cal sync)