I have a blackberry professional Software on Server 2003, I have 2 blackberries a Curve 8330 from Verizon and a World Edition 8830. If I send an invitation from Outlook, the email is never delivered to the blackberry and never goes into the calendar. I deleted the user from the blackberry software and re-added, and then wiped the 2 hand helds and nothing.. The other phones are working fine.. I even updated the blackberry softeware on each phone and still nothing..