3.7 Summarizing Exchange basics

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The architecture of Exchange 2000/2003 delivers much greater granularity for management operations. Companies migrating from Exchange 5.5 start with an organization where each site is represented by an administrative group and a routing group. It is unlikely that the Exchange 5.5 site design is the most efficient or effective design in Exchange 2000/2003 terms, but evolution to an improved infrastructure is only possible by creating new administrative groups and moving mailboxes to the servers in those groups and then removing old administrative groups. Once in native mode, you can create multiple routing groups under a single administrative group and gradually separate the management of the routing topology away from dayto-day system management. Greater flexibility is possible when you design new Exchange infrastructures but only during the design phase. The same restrictions on server movement and organizational restructure exist after you deploy servers.

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