Microsoft Product

Live Communications Server

Live Communications Server is Microsoft's enterprise instant messaging and presence server, released to manufacturing as Live Communications Server 2005 in October 2004. It came in Standard and Enterprise Editions for the first time and added federation, letting organizations share IM and presence in an encrypted, authenticated and managed environment. It builds on Live Communications Server 2003 and integrates with the Microsoft Office System.

Live Communications Server is a Microsoft product filed under Video Conferencing Software. Lifecycle: versioned, 4 versions listed, latest 2005 Service Pack 1 (28 Apr 2005).

Source: Microsoft Delivers Microsoft Office Live Communications Server 2005 - Source, retrieved 15 Oct 2026

Video Conferencing Software

Releases and Lifecycle

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Release and support dates as published by Microsoft; dates within the next 12 months are highlighted, past dates dimmed. Retrieved 2026-10-13.

Live Communications Server 4 versions

Version	Released	End of standard support	End of extended support	End of life	Source
2005 Service Pack 1Fixed Lifecycle Policy	28 Apr 2005	–	–	14 Apr 2015	[1][207]
2005Fixed Lifecycle Policy	22 Jan 2005	13 Apr 2010	14 Apr 2015	–	[1][207]
2005 (original release, no service pack)Fixed Lifecycle Policy	22 Jan 2005	–	–	10 Jul 2007	[1][207]
2003Fixed Lifecycle Policy	13 Nov 2003	13 Jan 2009	14 Jan 2014	–	[1][208]

Lifecycle Policy

Fixed Lifecycle Policy. Products with a defined support timeline at launch: a minimum of five years of Mainstream Support, then a period of Extended Support for some products, with service pack levels required for eligibility. [1]

Sources 3

Fixed Lifecycle Policy retrieved 2026-10-13
Microsoft Office Live Communications Server 2005 lifecycle retrieved 2026-10-13
Microsoft Office Live Communications Server 2003 lifecycle retrieved 2026-10-13

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