When you try to move mailboxes from a Microsoft Exchange Server 2007 server to a Microsoft Exchange Server 2010 server, certain mailboxes cannot be moved. Additionally, the following event is logged on the Exchange Server 2010 server:
Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.