As I stated previously, we have 2 Ex2000 servers, one Ex2003 server and one Ex2007 server. We got BB's working on the Ex2007 server just fine. The BES acct is on the 2007 server and the BES server has the correct dll and MAPI for Ex2007.

Currently the most important VIP's are on the Ex2003 server and are using their BB's. They will be moved to Ex2007 as soon as we are ready to do so, probably by the end of the month.

We are experiencing calendaring issues with these users who are also using Outlook 2007 and sending/receiving meeting requests to those who are using Outlook 2003. Duplicates are being created when updates are sent between mismatching outlook clients.

We have opened a ticket with Microsoft about this, but I was wondering if there was any chance that the BES ex2007 cdo may be at the root of all this? Has anyone else had a similar issue?