... involved in migrating from Exchange Server 5.5 to Exchange Server 2003. Active Directory and Exchange Server 5.5 Considerations Before installing Exchange Server 2003, you should familiarize ... an Exchange Server 2003 Messaging System Exchange Server 2003 Security Hardening Guide Exchange Server Deployment Tools The Exchange Server Deployment Tools are tools and documentation ... Exchange- specific attributes. Exchange Server 5.5 has its own directory service, which, by default, cannot communicate with Active Directory and Exchange Server 2003. Therefore, Exchange Server...