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Past Windows Server Versions
Jan. 19, 2004

Windows 2000 Server and Windows 2003 Server are the only fully supported versions of Microsoft's server OSs as of Jan. 2004. Extended support for Windows NT 4.0 Server ends Dec. 31, 2004, and support other than security-related hotfixes requires a custom support contract.

As with other products, server OSs are supported with only the most recent service pack, but customers receive one year to migrate to that service pack. This means, for example, that Windows 2000 Server with Service Pack 3 will be supported until June 26, 2004.

Product Current Service Pack Mainstream 1
Support Ends 		Extended 2
Support Ends 		Release History
Windows NT 4.0 Server SP6a; Nov. 30, 1999 Dec. 31, 2002 (paid support ends Jan. 1, 2005) Dec. 31, 2004 Released: July 1996

SP1: Sept.1996

SP2: Dec.1996

SP3: Apr. 1997

SP4: Oct.1998

SP5: May 1999
Windows 2000 Server SP4; June 26, 2003 Mar. 31, 2005 Mar. 31, 2007 Released: Mar. 2000

SP1: July 2000

SP2: May 2001

SP3: Aug. 2002
Windows Server 2003 SP1 (in beta anticipated mid-2004) June 30, 2008 June 20, 2010 Released: May 2003

1 During the mainstream support phase, Microsoft offers full support, including hotfixes, service packs, free telephone support (depending on the product warranty), and paid per-incident and contract support.

2 During the extended phase, free security patches, paid hotfixes, and phone support continue but most other forms of support do not.

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