Exchange 2010 SP3

Exchange Server 2010 Service Pack 3 (SP3) has been released, raising the Exchange version number to 14.3.123.4

Besides the fixes that were part of the Exchange 2010 SP2 Rollups 1 to version 6, SP3 introduces the following features:

• Exchange 2013 Coexistence
  This Service Pack for Exchange 2010 adds coexistence with Exchange 2013; however, it requires Exchange Server 2013 to have Cumulative Update 1 (CU1), which hasn’t been released yet.

• Windows Server 2012 Support
  This Service Pack enables you to deploy Exchange Server 2010 on WIndows Server 2012 platform.

• Internet Explorer 10
  You can now use Internet Explorer 10 to connect to Exchange 2010.

• Sent Items Management
  You can now control behavior of Send-As or Send-on-Behalf messages regarding the folder used to store a copy of the sent message, analogue to the Delegated Send Items options available in Outlook.

Warning : after loading SP3 on mailboxes, databases are updated to the SP3 version database schema, so a SP3 database cannot be mounted on a non SP3 mailbox server.  For a DAG you will have limited opens for failover during a upgrade, and after the upgrade on a server the copy will not activate, you will have to run:  PS> suspend-mailboxdatabasecopy -id "mailboxdatabase\servername" followed by update-mailboxdatabasecopy -id "mailboxdatabase\servername"  -DeleteExistingFiles

You can download Exchange 2010 SP3

http://www.microsoft.com/en-us/download/details.aspx?id=36768