Migrating from Exchange 5.5 to Exchange 2003

Migrating from Exchange Server 4.0 to Exchange 5.0—or from Exchange 5.0 to Exchange 5.5—is a relatively simple endeavor. However, when Exchange 2000 Server debuted, we faced a steep learning curve as we struggled to grasp the complexities of an Exchange 5.5—to—Exchange 2000 migration. You might think that a migration from Exchange 5.5 to Exchange Server 2003 would involve even more complexity, but the truth is that it's no more difficult than a migration to Exchange 2000 and, if anything, is slightly more straightforward.

The technologies and techniques we learned during an Exchange 2000 migration are just as relevant today for Exchange 2003, so now's the time to dust off your notes about the Active Directory Connector (ADC) and the Site Replication Service (SRS)—the indispensable tools for Exchange 5.5—to—Exchange 2003 interoperability. Let's look at the basic approaches you can take to move from Exchange 5.5 to Exchange 2003. I won't delve into great detail about interoperability because the interoperability model is the same as the one between Exchange 5.5 and Exchange 2000. If you need a refresher course, see "Planning an Exchange 2000 Migration Strategy," http://www.exchangeadmin.com, InstantDoc ID 8863. . . .