The Active Directory driver can be configured to provision Active Directory accounts as well as Exchange 2000, Exchange 2003, and Exchange 2007 accounts.
The driver can synchronize Exchange 2000 and Exchange 2003 accounts or Exchange 2007 accounts. It cannot synchronize all types of Exchange accounts at the same time. If you have multiple types of Exchange accounts you must set up two separate drivers to synchronize the Exchange 2007 accounts and Exchange 2000 and 2003 accounts.