Exchange Calendar Issues fixed with Rollups

Microsoft released rollups for its Exchange Servers on April 13, 2010:

• 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

Exchange 2010

1. RPC clients or MAPI on the Middle Tier clients may not receive responses from the mailbox server role on an Exchange 2010 server (KB981664)

Note: Microsoft recommends that you Clear the 'Check for publisher’s certificate revocation' for Outlook users. For OWA users, this rollup overwrites any customizations made to your "logon.aspx" pages.