Updated: July 9, 2020 (September 5, 2005)

Past Exchange Server Versions

As managing vice president, Rob Helm covers Microsoft collaboration and content management. His 25-plus years of experience analyzing Microsoft’s technology... more

Product	Current Service Pack	Mainstream Support Ends	Release History	Notes
Exchange Server 5.5	SP4: Nov. 7, 2000	Ended Dec. 31, 2003	Released: Dec. 1997 SP1: Aug. 1998 SP2: Dec. 1998 SP3: Sept. 1999	Extended support ends Dec. 31, 2005
Exchange Server 2000	SP3: July 18, 2002	Dec. 31, 2005	Released: Nov. 2000 SP1: June 2001 SP2: Dec. 2001	Requires Windows 2000 and Active Directory. Cannot run on Windows Server 2003; can work in Windows Server 2003 domains.
Exchange Server 2003	SP1: May 25, 2004	2008 (est.)	Released: Sept. 2003	Some features require Windows Server 2003, Outlook 2003.

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