Mailbox export

http://exchangeserverpro.com/export-mailboxes-exchange-server-2010-sp1

1.

"MRS resides on all Exchange 2010 Client Access servers and is the service responsible for moving mailboxes, importing and exporting .pst files, and restoring disabled and soft-deleted mailboxes."

http://technet.microsoft.com/en-us/library/ee633455.aspx

2.

You can export messages, contacts and calendar items (resp. folders).

http://technet.microsoft.com/en-us/library/ff607299.aspx