I tried seaching around a bit but didn't see anyone else with this issue. When I sync my BB with my Outlook Calendar it tries to delete all of my old appointments. I went into my BB and under the General Calendar Options I changed the "Keep Appointments" to Forever, but it still is trying to delete my old ones. Any help?
Go to into desktop manager > synchronize > click Synchronization under configuration then click the Synchronization button go back threw the steps to setup the cal sync and read it carefully there is a place in there that gives you the option to let the "device win" or "outlook win" or a couple other options try that
Under the synchronization setup for the calendar, if you choose 1 way sync from outlook to blackberry, a checkbox opens below that allows the target data to be replaced on every sync. Make sure that is unchecked.