"Gideon Kay" wrote in message
...

I am having the same problems except connected to Exchange 2003. When offline
the calendar entries just dissapear. I have tried all the above. Online
works
fine as do windows mobile phones. I have also stopped the AV scanning the
OST
file just to make sure. Any other ideas please?

Sounds like a Cached Exchange mode issue. I'd disable Cached Exchange mode,
delete the OST, reenable Cached Exchnage mode, and let Outlook build a new
OST.
--
Brian Tillman [MVP-Outlook]