You encounter a long delay for each mailbox when you run the "Move-Mailbox" or "Set-Mailbox" command on an Exchange Server 2007 computer

Consider the following scenario:

• You perform an Active Directory authoritative restore on a domain controller in a large Active Directory environment.
• You run the Move-Mailbox or Set-Mailbox command in the Exchange management shell on a computer that is running Microsoft Exchange Server 2007 Service Pack 1 (SP1).

In this scenario, you encounter a long delay for each mailbox in the Active Directory environment.

This issue occurs because the Recipient Update Service (RUS) in Exchange Server 2007 checks the up-to-date data for all replication-related domain controllers. In a large Active Directory environment, there are many replication-related domain controllers because of the authoritative restore process. Therefore, the RUS in Exchange Server 2007 spends several minutes unnecessarily checking the up-to-date data for all replication-related domain controllers.

To resolve this problem, install Update Rollup 4 for Exchange Server 2007 Service Pack 1 (SP1) on the Exchange server. For more information about Update Rollup 4 for Exchange 2007 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

For more information about the Active Directory authoritative restore process, visit the following Web site:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.