MCSA/MCSE Implementing and Managing Exchange Server 2003 Exam Cram 2 (Exam Cram 70-284)

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This chapter deals with the exam topics you need to understand in regard to upgrading to Exchange Server 2003 from prior versions of Exchange, migration from other messaging systems, coexistence with other messaging systems, coexistence with other Exchange organizations, and interoperability with other SMTP messaging systems.

Microsoft understands that it is rare for Exchange Server 2003 to be installed into an environment in which there is no prior messaging infrastructure. For this reason, an important part of the exam is knowing how to migrate to Exchange Server 2003 from other messaging systems or prior versions of Exchange. Similarly, Microsoft realizes that in many situations, disparate messaging systems need to coexist with each other. This is the reason for the focus on interoperability on the exam, although Microsoft prefers, of course, that you migrate all messaging clients to Exchange Server 2003 at your earliest possible convenience.

If possible, it is beneficial for candidates to have experience upgrading from Exchange Server 5.5 and Exchange 2000 Server. As a student, the best option is to create a test network using virtual machine software, such as Virtual PC or VMWARE. This enables you to upgrade Exchange without negatively impacting a production Exchange network.

The installation of Exchange Server 2003 requires that substantial modifications be made to the Active Directory (AD) schema in the domain that will host Exchange Server 2003. For this reason, we recommend against installing Exchange Server 2003 in a production Active Directory environment, unless it is part of a planned and authorized deployment of the messaging system. Even though Exchange Server 2003 can later be uninstalled, the changes made to Active Directory itself are difficult to roll back. The schema modifications made by ForestPrep cannot be rolled back. In addition, it is important to note that only one Exchange organization can exist per forest. Any test deployment must be made with that understanding in mind.

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