A. As the name suggests, Exchange 2003, Enterprise Edition is a more scalable version of Exchange. The table below lists the major features of both Exchange editions in terms of storage groups and databases:


Exchange 2003, Standard Edition

Exchange 2003, Enterprise Edition

Number of storage groups



Number of databases per storage group



Maximum database size (each)

16 GB

8 TB

Both versions also support an additional storage group, the Recovery Storage Group, which is a special option available when you create a storage group. Exchange can use the Recovery Storage Group to restore an entire storage group, a database, or individual mailboxes on any Exchange server in the same Exchange administrative group while the original database is still running and servicing clients, without the need to create a separate recovery server (and all the work that requires).