- Update Rollup 10 for Exchange Server 2007 SP1 (KB981407),
- Update Rollup 4 for Exchange 2007 SP2 (KB981383), and
- Update Rollup 3 for Exchange 2010 (KB981401).
I want to report the calendar-related issues that these rollups fix:
Exchange 2007 (SP1 and SP2) - No calendar-related fixes in this rollup
- RPC clients or MAPI on the Middle Tier clients may not receive responses from the mailbox server role on an Exchange 2010 server (KB981664)