We have some BlackBerry synchronization problems. A Google search of "Cached Exchange Mode and BlackBerry", but I can't really find a definitive answer. Is there anybody here who has tested this and has a definitive answer? Can I use Cached Exchange Mode in combination with BlackBerry/BES?
Yes, you can use Cached Exchange Mode in Outlook with BES. What synchronization problems are you experiencing?
Make sure your BES software is up-to-date. The BES use to have some problems with BB sync'ing when Exchange Cached Mode was enabled especially with reoccuring meetings. These issues were all fixed quite some time ago though.
This actually has to do with Anti-virus software and BES conflicting, since once Outlook receives a copy of the e-mail, your anti-virus program will mark the message as scanned. BES also does something to this degree, as it marks the message as sent. Since BES is making changes directly to the copy on the mail store, and your anti-virus is making changes to the copy in your local cached mailbox, a conflict occurs.