Dear Folks,
Microsoft Exchange Team has released the Exchange 2010 Roll up 4.
Major fixes:
- 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
Zahir Hussain Shah
Azure Hybrid & Cloud Migration Blog 
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