. This update also resolves the issues that are described in the following Microsoft Knowledge Base (KB) articles:
2710975 Some MAPI property objects in an ANSI .pst file contain unreadable characters if you import the file by using the “New-MailboxImportRequest” cmdlet
2748766 Retention policy information does not show “expiration suspended” in Outlook Web App when the mailbox is set to retention hold in an Exchange Server 2010 environment
2748767 You receive an NDR message that incorrectly contains recipients of successful message delivery in an Exchange Server 2010 environment.
2748879 You cannot access a mailbox by using an EWS application in an Exchange Server 2010 environment
2749075 A copy of an archived item remains in the Recoverable Items folder of a primary mailbox in an Exchange Server 2010 environment
2749593 Outlook logging file lists all the accepted and internal relay domains in the Exchange Server 2010 organization when you enable troubleshooting logging
2750293 Items remain in the “Recoverable Items\Deletions” folder after the retention age limit is reached in an Exchange Server 2010 environment
2763886 “The operation failed” error in the Outlook client when you open a saved message from the Drafts folder and then try to send it in an Exchange Server 2010 environment
Assume that you apply the Update Rollup 4 version 2 for Exchange Server 2010 SP2 (KB2756485), and then you apply the Update Rollup 5 version 1 (KB2719800). In this situation, when you try to run the Get-DatabaseAvailabilityGroup cmdlet, you receive the following error message:
WARNING: An unexpected error has occurred and a Watson dump is being generated: Could not load type ‘Microsoft.Exchange.Rpc.ActiveManager.AmDeferredRecoveryEntry’ from assembly ‘Microsoft.Exchange.Rpc, Version=220.127.116.11, Culture=neutral, PublicKeyToken=31bf3856ad364e35’.