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Find and manage updates for Skype for Business Server 2019, Skype for Business Server 2015, Lync Server 2013, and Lync Server 2010 in one place. Use the links on this page to get more information about updates, and then download the updates.

Get Skype Release Notes support for your The new Skype for Windows, Mac and Linux and stay connected with friends and family from wherever you are.

For the latest Skype for Business Online and Microsoft 365 updates, see the Microsoft 365 Roadmap.

Skype for Business Server 2019 update history

KB 4470124 is the master KB for Skype for Business Server 2019 which has all the historical list of all the Cumulative Update and Hotfixes that have been published.

Package NameKB NumberRelease Date
Skype for Business Server 2019 Cumulative Update 3KB 4470124March 2020
Skype for Business Server 2019 Cumulative Update 2KB 4470124December 2019
Skype for Business Server 2019 Cumulative Update 1 Hotfix 1KB 4470124September 2019
Skype for Business Server 2019 Cumulative Update 1KB 4470124July 2019

Skype for Business Server 2019 tools

Package Name/LinkRelease Date
UCMA 6.0 SDK June 2019
Unified Communications Managed API 5.0 RuntimeJune 2018
Skype for Business Server 2019, Management PackJune 2018

Skype for Business Server 2015 update history

KB 3061064 contains all Cumulative Updates that have been released. Arial postscript font free.

Package NameKB NumberRelease Date
Skype for Business Server 2015 Cumulative Update 10 Hotfix 1KB 3061064August 2019
Skype for Business Server 2015 Cumulative Update 10KB 3061064July 2019
Cumulative update 9 for Skype for Business Server 2015, Web Components ServerKB 4487981May 2019
Cumulative update 8 for Skype for Business Server 2015, Front End Server and Edge ServerKB 4464355January 2019
Cumulative update 7 for Skype for Business Server 2015, Front End server and Edge serverKB 4340904July 2018
Cumulative update 6 Hotfix 2 for Skype for Business Server 2015, Front End server and Edge serverKB 4086059March 2018
Cumulative update 6 Hotfix 1 for Skype for Business Server 2015, Front End server and Edge serverKB 4074701January 2018
Cumulative update 6 for Skype for Business Server 2015, Front End server and Edge serverKB 4036312December 2017
Cumulative update 5 for Skype for Business Server 2015, Front End server and Edge serverKB 4012621May 2017
Cumulative update 4 Hotfix 1 for Skype for Business Server 2015, Front End server and Edge serverKB 3207506February 2017
Cumulative update 4 for Skype for Business Server 2015, Front End server and Edge serverKB 3199093November 2017
Cumulative update 3 for Skype for Business Server 2015, Front End server and Edge serverKB 3149227June 2016
Cumulative update 2 for Skype for Business Server 2015, Front End server and Edge serverKB 3134260March 2016
Cumulative update 1 for Skype for Business Server 2015, Front End server and Edge serverKB 3097645November 2015
Cumulative update for Skype for Business Server 2015, core componentsKB 3098601September 2015
Cumulative update for Skype for Business Server 2015, Front End server and Edge serverKB 3061059June 2015

Skype for Business Server 2015 tools

Package Name/LinkRelease Date
UCMA 5.0 SDK May 2015
Unified Communications Managed API 5.0 RuntimeMay 2015
Skype for Business Server 2015, Management PackJune 2019

Lync Server 2013 update history

KB 2809243 contains all Cumulative Updates that have been released.

Package NameKB NumberRelease Date
Lync Server 2013 Cumulative Update 10 Hotfix 3KB 4515509September 2019
Lync Server 2013 Cumulative Update 10 Hotfix 2KB 4501392June 2019
Lync Server 2013 Cumulative Update 10 Hotfix 1KB 4458772January 2019
Lync Server 2013 Cumulative Update 10KB 4295703July 2018
Lync Server 2013 Cumulative Update 9KB 4019183July 2017
Lync Server 2013 Cumulative Update 8 Hotfix 4KB 4014154March 2017
Lync Server 2013 Cumulative Update 8 Hotfix 3KB 3210166January 2017
Lync Server 2013 Cumulative Update 8 Hotfix 2KB 3212869December 2016
Lync Server 2013 Cumulative Update 8 Hotfix 1KB 3200079November 2016
Lync Server 2013 Cumulative Update 8KB 3175336August 2016
Lync Server 2013 Cumulative update 7KB 3140581April 2016
Lync Server 2013 Cumulative Update 6 Hotfix 2KB 3175338January 2016
Lync Server 2013 Cumulative Update 6 Hotfix 1KB 3121213December 2015
Lync Server 2013 Cumulative Update 6KB 3081739September 2015
Lync Server 2013 Cumulative Update 5 Hotfix 10KB 3064728July 2015
Lync Server 2013 Cumulative Update 5 Hotfix 9KB 3051951May 2015
Lync Server 2013 Cumulative Update 5 Hotfix 8KB 3031065February 2015
Lync Server 2013 Cumulative Update 5 Hotfix 7.1KB 3027553December 2014
Lync Server 2013 Cumulative Update 5 Hotfix 7KB 3018232December 2014
Lync Server 2013 Cumulative Update 5 Hotfix 6KB 3010028November 2014
Lync Server 2013 Cumulative Update 5 Hotfix 5KB 3003358October 2014
Lync Server 2013 Cumulative Update 5 Hotfix 2KB 2987511Sept 2014
Lync Server 2013 Cumulative Update 5KB 2937305August 2014
Lync Server 2013 Cumulative Update 4KB 2905040January 2014
Lync Server 2013 Cumulative Update 3KB 881682October 2013
Lync Server 2013 Cumulative Update 2KB 2835432July 2013
Lync Server 2013 Cumulative Update 1KB 2781550February 2013

Lync Server 2013 Dev tools

Package Name/LinkRelease Date
Unified Communications Managed API 4.0 Runtime Cumulative UpdateJuly 2013
Lync Server 2013 SDKFebruary 2013
Lync 2013 SDKMarch 2014
Lync Server 2013 Debugging ToolsJanuary 2014
Lync Server 2013 Persistent Chat Server SDKOctober 2013
Unified Communications Managed API 4.0 SDKFebruary 2013
Unified Communications Managed API 4.0 RuntimeOctober 2012
UC Enhanced Presence Schemas for Lync Server 2013October 2012

Pre-configured VHDs

The complete topology consists of 7 virtual machines that enable you to fully evaluate the Microsoft Lync 2013, Microsoft Exchange 2013, SharePoint 2013, and UC developer platform APIs (including Microsoft Lync 2013 SDK, Exchange Web Services Managed API 2.0, Microsoft Lync Server 2013 SDK, and Microsoft Unified Communications Managed API 4.0).

Package Name/LinkRelease Date
Test Drive - Lync Server 2013 - Part 1 of 3September 2013
Test Drive - Lync Server 2013 - Part 2 of 3September 2013
Test Drive - Lync Server 2013 - Part 3 of 3September 2013

Lync 2013 Tools

Package Name/LinkRelease Date
Lync Connectivity Analyzer (32-bit) RETIREDJune 2017
Lync Connectivity Analyzer (64-bit) RETIREDJune 2017
Lync Server 2013 Best Practices AnalyzerOctober 2012
Lync Server 2013 Capacity CalculatorJuly 2013
Lync Server 2013 Debugging ToolsJanuary 2014
Lync Server 2013 Management PackMay 2016
Lync Server 2013 Persistent Chat Resource KitJuly 2013
Lync Server 2013 Planning ToolJuly 2013
Lync Server 2013 Resource Kit ToolsJanuary 2014
Lync Server 2013 Stress and Performance ToolMarch 2013
Lync Server 2013 Whiteboard Archiving ViewerFebruary 2013
Lync VDI 2013 plugin (32-bit)October 2012
Lync VDI 2013 plugin (64-bit)October 2012
New Office Visio StencilJuly 2016

Lync 2013 downloadable documentation

Package Name/LinkRelease Date
Lync Server 2013 Documentation Help FileAugust 2015

Lync Server 2010 update history

KB 2493736 contains all Cumulative Updates that have been released.

Package NameKB NumberRelease Date
Lync Server 2010 Cumulative Update 18 Hotfix 1KB 2493736June 2019
Lync Server 2010 Cumulative Update 18KB 2493736January 2019
Lync Server 2010 Cumulative Update 17KB 3148801April 2016
Lync Server 2010 Cumulative Update 16KB 3057803May 2015
Lync Server 2010 Cumulative Update 15KB 3030726February 2015
Lync Server 2010 Cumulative Update 13KB 2982385
KB 2982388
September 2014
Lync Server 2010 Cumulative Update 12KB 2957044April 2014
Lync Server 2010 Cumulative Update 11KB 2909888January 2014
Lync Server 2010 Cumulative Update 10KB 2889610October 2013
Lync Server 2010 Cumulative Update 9KB 2860700July 2013
Lync Server 2010 Cumulative Update 8KB 2791381July 2013
Lync Server 2010 Cumulative Update 7KB 2737915October 2012
Lync Server 2010 Cumulative Update 6KB 2701585June 2012
Lync Server 2010 Cumulative Update 5KB 2670352February 2012
Lync Server 2010 Cumulative Update 4KB 2514980November 2011
Lync Server 2010 Cumulative Update 3KB 2571546July 2011
Lync Server 2010 Cumulative Update 2KB 2500442April 2011
Lync Server 2010 Cumulative Update 1KB 2467775January 2011

Group Chat 2010 updates

Package NameKB NumberRelease Date
Cumulative update for Lync Server 2010, Group ChatKB 2884623October 2013
Cumulative update for Lync Server 2010, Group Chat Administration ToolKB 2884631October 2013
Cumulative update for Lync 2010, Group ChatKB 2884627October 2013

Lync 2010 Dev Tools

Package Name/LinkRelease Date
Lync Server 2010 SDKNovember 2010
Lync 2010 SDKMarch 2011
Lync Server 2010 Group Chat SDKJune 2012
Unified Communications Managed API 3.0 SDKMay 2016
Speech Platform - Server Runtime Languages (Version 10.2)September 2010
Unified Communications Enhanced Presence Schemas for Microsoft Lync Server 2010November 2010

Lync 2010 Tools

Package Name/LinkRelease Date
IM an Expert for Microsoft Lync Server 2010March 2012
Lync Server 2010 Best Practices AnalyzerFebruary 2011
Lync Server 2010 Capacity CalculatorFebruary 2012
Lync Server 2010 Planning ToolFebruary 2011
Lync Server 2010 Resource Kit ToolsMay 2012
Lync Server 2010 Stress and Performance ToolMarch 2011
Lync Server 2010 Visio StencilFebruary 2011
Lync Server 2010 Web SchedulerApril 2011

Lync 2010 downloadable documentation

Package Name/LinkRelease Date
Lync Server 2010 Documentation Help FileMarch 2012
Lync Server 2010 Welcome pageOctober 2012
IM an Expert for Microsoft Lync Server 2010 DocumentationMarch 2012
Lync 2010 Release Notes.aspx)January 2011
Lync Server 2010 Release NotesJanuary 2011
Lync Server 2010 Planning Tool ReadmeJanuary 2011
Lync Server 2010 Edge Server Reference Architecture DiagramsMarch 2011

Resource kit (technical reference)

Visit the Microsoft Lync Server 2010 Resource Kit download site to download book chapters individually OR download a .zip file containing all 19 chapters of the resource kit.

Group Chat

Package Name/LinkRelease Date
Lync Server 2010 Group ChatNovember 2010
Lync Server 2010 Group Chat Admin ToolNovember 2010
Lync 2010 Group ChatNovember 2010

Trial Software

Package Name/LinkRelease Date
VHD Test Drive - Lync Server 2010 (Eval) - Part 1 of 2September 2012
VHD Test Drive - Lync Server 2010 (Eval) - Part 2 of 2September 2012

Additional information

Software updates include any update, update rollup, service pack, feature pack, critical update, security update, or hotfix. See KB 824684 for a description of the standard terminology used to describe Microsoft software updates.

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