in our BES 4.0.5 environment (approx 200 users, exchange 2003 SP2) we see a LOT of wireless calendar sync problems, most of them including disappearing calender items on the BB!
most of them have delegates looking into their calendars, invitations get accepted, updated, and then... lost. We have constantly users complaining about non-synchronised calender entries.
we have the same CDO.dll registered... any ideas??