You cannot move a mailbox across forests in an Exchange 2007 organization

When you try to move a mailbox across forests in a Microsoft Exchange Server 2007 organization, the move mailbox operation is unsuccessful. Additionally, the following error message is logged in the Exchange Management Shell:

This problem occurs if the display name of a mailbox contains a comma. When this occurs, the move mailbox operation cannot correctly read the source account name. Additionally, the move mailbox operation cannot create a new account by using a new account name in the target forest.

To resolve this problem, install Update Rollup 3 for Exchange Server 2007. For more information about Update Rollup 3 for Exchange Server 2007, see the following Exchange Help topic: For more information about how to install the latest Exchange service pack or update rollup, see the following Exchange Help topic:

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

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the naming schema for Exchange Server software updates, click the following article number to view the article in the Microsoft Knowledge Base: