You cannot create a new mailbox or enable a mailbox in an Exchange Server 2007 environment on February 29, 2008

When you try to create a new mailbox or enable a mailbox in a Microsoft Exchange Server 2007 environment on February 29, 2008, you receive the following error message:

To resolve this problem, download and then install Update Rollup 5 for Exchange Server 2007 Service Pack 1.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

To work around this problem, wait until midnight Coordinated Universal Time (UTC) March 1, 2008. Then, restart the Microsoft Exchange System Attendant service.

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

If the Microsoft Exchange System Attendant service is started or restarted between midnight UTC February 29, 2008, and midnight UTC March 1, 2008, certain configuration data will not be initialized. This situation leads to the failure of any command that requires the Recipient Update Service, such as the new-mailbox command or the enable-mailbox command. Additionally, this situation generates the error message that is mentioned in the "Symptoms" section.