After completing the course, students will be able to explain the process of upgrading from Exchange Server 5.5 to Exchange 2000; populate the Active Directory with Exchange Server 5.5 user information and keep the two directories synchronized by using the Active Directory Connector (ADC); plan and deploy recipient connection agreements; establish and maintain both messaging coexistence and directory coexistence between Exchange Server 5.5 and Exchange 2000; upgrade an existing messaging environment to Exchange 2000; choose an upgrade deployment strategy and create a deployment project plan for upgrading Exchange Server 5.5 to Exchange 2000.