Storm / Desktop Manager Deleting Older Calendar Entries During Outlook Sync

[Danny-O]

I sync locally with Outlook (not hooked up with an Exchange Server), and at times I get an alert during the Calendar sync that there will be one or more deletions of calendar entries applied to Outlook from the Storm.  If I accept, the entries are gone, and I can no longer archive them with Outlook.  If I cancel, none of the calendar entries are sync'd.  I want the old entries so I can rewind my calendar to see where I was (travel) or what I was doing on a particular date.

How do I prevent the Storm / Desktop Manager from deleting old calendar entries?