I am just finishing an Exchange 2003 - 2010 migration, but after migrating BesAdmin and all the Blackberry users to Exchange 2010, the users calendar in the mailbox is not synchronizing with the BBs and viceversa.
Here some details about my configuration:
4 Exchange 2010 SP1 Servers (2 Mailbox in a DAG, 2 CAS/HT in NLB)
2 Exchange 2003 SP2 (One FrontEnd, One BackEnd)
1 BES 5.0.2 (Previously it was BES 4.7.6 with Exchange 2003, one month ago was upgraded to BES 5.0.2, during this weekend Exchange 2003 was uninstalled and the new MAPI32/CDO were installed for bringing compatibility with the migrated users)
I followed the documentation about the Exchange 2010 permisions, DBs permisions, Policy rules, MAPI32/CDO components, etc but unfortunatelly the calendar synchronization didn't work
Notes: Lookup, Mail and contacts sync works correctly
Thanks in advance !