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This article describes the features and components of Microsoft Exchange Server 2003 Standard Edition and Microsoft Exchange Server 2003 Enterprise Edition.
Both editions of Exchange 2003 feature:
Exchange 2003 Management Pack
Integrated support for mobile devices
Volume Shadow Copy service
Ability to be configured as a front-end server for Microsoft Outlook Web Access, Microsoft Outlook Mobile Access, Microsoft ActiveSync, Post Office Protocol 3 (POP3), Internet Message Access Protocol (IMAP), and Simple Mail Transfer Protocol (SMTP)
Recovery Storage Group
Exchange Server 2003 Standard Edition
Exchange 2003 Standard Edition is designed to meet the messaging and collaboration requirements of small and medium corporations and for specific messaging server roles or branch offices.
One storage group can be created on a server
One mailbox store database and one public folder store database that can be accessed by using MAPI and Outlook Web Access
Up to four more public folder store databases that are accessible only programmatically
Maximum 16-gigabyte (GB) database limit per database (75 GB with Microsoft Exchange Server 2003 Service Pack 2)
Exchange clustering is not supported
X.400 connector is not included
Exchange Server 2003 Enterprise Edition
Exchange 2003 Enterprise Edition is designed for large enterprise corporations. With Exchange 2003 Enterprise Edition, you can create multiple storage groups and multiple databases. Exchange 2003 Enterprise Edition provides an unlimited message store that removes the constraints on how much data a single server can manage.
Four storage groups
Five databases per storage group
16 terabyte database limit, limited only by hardware