- You are part of a mixed Microsoft Exchange Server 2007 and Microsoft Exchange Server 2010 environment.
- You have an Exchange Server 2010 server that has the Client Access server role installed.
- You have an Exchange ActiveSync device that connects to the Exchange Server 2010 Client access server.
- You synchronize the mailboxes between the device and an Exchange Server 2007 server.
Article ID: 2556133 - Last Review: Aug 24, 2011 - Revision: 1