Rollup 4 for Exchange Server 2010

The exchange team has released Update Rollup 4 for Exchange Server 2010 RTM (KB 982639)

KB 982639 lists all the fixes included in this rollup. Here are some of the product improvements and critical bug fixes we'd like to call out starting with 5 improvements we made to prevent crashes in very unique scenarios.

• KB 980852 The RpcClientAccess process on an Exchange server 2010 server crashes when you access a mailbox by using a MAPI application
• KB 979801 An error message is generated in Exchange Server 2010 when you use Exchange Troubleshooting Assistant
• KB 980364 The Exchange Transport service on an Exchange Server 2010 server crashes when a certain message is processed
• KB 980353 A MAPI application that is used to access Exchange Server 2010 mailboxes crashes when the application accesses an address book
• KB 979790 An IMAP4 client crashes when accessing an Exchange Server 2010 mailbox

We corrected a few replication issues some of you encountered.

• KB 980149 The Add-MailboxDatabaseCopy command fails when it is used to add a database copy to a Database Availability group in an Exchange Server 2010 environment
• KB 981961 Event ID 4033 is logged and the free/Busy replication from an Exchange server 2003 server to an Exchange Server 2010 server fails
• KB 979921 You cannot replicate a public folder from one microsoft exchange server 2010 server to another, and Event ID 3079 is logged on the target server

Important:
microsoft update does not detect Update rollups on Exchange Server 2010 Mailbox servers that are part of a database availability group (DAG).

Download Rollup 4 for exchange 2010 HERE