"c:\Program Files\Microsoft Office\Office10\OUTLOOK.EXE" /CleanFreeBusy
will regenerate the busy days indicators on the Outlook Calendar after a Blackberry sync.
"c:\Program Files\Microsoft Office\Office10\OUTLOOK.EXE" /resetfolders
can fix sync problems between Outlook and a Blackberry. In my case the memopad to notes. Special thanks to Michael-D-Clark for the solution.
Here is the full list of switches from Microsoft