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Skype for Business Server updates

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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.

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. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.

Package name KB number Release date
Description of the security update for Skype for Business Server: October 10, 2023 KB 5032429 October 2023
Skype for Business Server 2019 Cumulative Update 7, Hotfix 1 KB 4470124 July 2023
Skype for Business Server 2019 Cumulative Update 7 KB 4470124 June 2023
Skype for Business Server 2019 Cumulative Update 6, Hotfix 3 KB 4470124 October 2022
Description of the security update for Skype for Business Server and Lync Server: July 12, 2022 KB 5016714 July 2022
Description of the security update for Skype for Business Server: April 12, 2022 KB 5012686 April 2022
Skype for Business Server 2019 Cumulative Update 6 KB 4470124 December 2021
Skype for Business Server 2019 Cumulative Update 5 KB 4470124 (MACP3) March 2021
Skype for Business Server 2019 Cumulative Update 4, Hotfix 1 KB 4470124 November 2020
Skype for Business Server 2019 Cumulative Update 4 KB 4470124 September 2020
Skype for Business Server 2019 Cumulative Update 3, Hotfix 1 KB 4470124 July 2020
Skype for Business Server 2019 Cumulative Update 3 KB 4470124 March 2020
Skype for Business Server 2019 Cumulative Update 2 KB 4470124 December 2019
Skype for Business Server 2019 Cumulative Update 1, Hotfix 1 KB 4470124 September 2019
Skype for Business Server 2019 Cumulative Update 1 KB 4470124 July 2019

Skype for Business Server 2019 tools

Package name Release date
UCMA 6.0 SDK June 2019
Unified Communications Managed API 5.0 Runtime June 2018
Skype for Business Server 2019, Management Pack June 2018

Skype for Business Server 2015 update history

KB 3061064 is the master KB for Skype for Business Server 2015. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.

Package name KB number Release date
Description of the security update for Skype for Business Server: October 10, 2023 KB 5032429 October 2023
Skype for Business Server 2015 Cumulative Update 13 KB 3061064 August 2023
Skype for Business Server 2015 Cumulative Update 12, Hotfix 4 KB 3061064 December 2022
Description of the security update for Skype for Business Server and Lync Server: July 12, 2022 KB 5016714 July 2022
Description of the security update for Skype for Business Server: April 12, 2022 KB 5012686 April 2022
Skype for Business Server 2015 Cumulative Update 13 KB 3061064 August 2023
Skype for Business Server 2015 Cumulative Update 12 Hotfix 1 KB 3061064 February 2022
Skype for Business Server 2015 Cumulative Update 12 KB 3061064 August 2021
Skype for Business Server 2015 Cumulative Update 11, Hotfix 2 KB 3061064 November 2020
Skype for Business Server 2015 Cumulative Update 11, Hotfix 1 KB 3061064 July 2020
Skype for Business Server 2015 Cumulative Update 11 KB 3061064 May 13, 2020
Skype for Business Server 2015 Cumulative Update 10, Hotfix 1 KB 3061064 August 2019
Skype for Business Server 2015 Cumulative Update 10 KB 3061064 July 2019
Cumulative update 9 for Skype for Business Server 2015, Web Components Server KB 4487981 May 2019
Cumulative Update 8 for Skype for Business Server 2015, Front End Server and Edge Server KB 4464355 January 2019
Cumulative Update 7 for Skype for Business Server 2015, Front End server and Edge server KB 4340904 July 2018
Cumulative Update 6 Hotfix 2 for Skype for Business Server 2015, Front End server and Edge server KB 4086059 March 2018
Cumulative Update 6, Hotfix 1 for Skype for Business Server 2015, Front End server and Edge server KB 4074701 January 2018
Cumulative Update 6 for Skype for Business Server 2015, Front End server and Edge server KB 4036312 December 2017
Cumulative Update 5 for Skype for Business Server 2015, Front End server and Edge server KB 4012621 May 2017
Cumulative Update 4, Hotfix 1 for Skype for Business Server 2015, Front End server and Edge server KB 3207506 February 2017
Cumulative Update 4 for Skype for Business Server 2015, Front End server and Edge server KB 3199093 November 2017
Cumulative Update 3 for Skype for Business Server 2015, Front End server and Edge server KB 3149227 June 2016
Cumulative Update 2 for Skype for Business Server 2015, Front End server and Edge server KB 3134260 March 2016
Cumulative Update 1 for Skype for Business Server 2015, Front End server and Edge server KB 3097645 November 2015
Cumulative Update for Skype for Business Server 2015, Core Components KB 3098601 September 2015
Cumulative Update for Skype for Business Server 2015, Front End server and Edge server KB 3061059 June 2015

Skype for Business Server 2015 tools

Package name Release date
UCMA 5.0 SDK May 2015
Unified Communications Managed API 5.0 Runtime May 2015
Skype for Business Server 2015, Management Pack June 2019

Lync Server 2013 update history

KB 2809243 is the master KB for Lync Server 2013. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.

Package name KB number Release date
Description of the security update for Skype for Business Server and Lync Server: July 12, 2022 KB 5016714 July 2022
Description of the security update for Skype for Business Lync Server 2013: April 12, 2022 KB 5012681 April 2022
Lync Server 2013 Cumulative Update 10, Hotfix 7 KB 5010850 February 2022
Lync Server 2013 Cumulative Update 10, Hotfix 6 KB 5003729 May 11, 2021
Lync Server 2013 Cumulative Update 10, Hotfix 5 KB 5000675, KB 5000688 February 9, 2021
Lync Server 2013 Cumulative Update 10, Hotfix 4 KB 4564312 July 2020
Lync Server 2013 Cumulative Update 10, Hotfix 3 KB 4518345 September 2019
Lync Server 2013 Cumulative Update 10, Hotfix 2 KB 4501392 June 2019
Lync Server 2013 Cumulative Update 10, Hotfix 1 KB 4458772 January 2019
Lync Server 2013 Cumulative Update 10 KB 4295703 July 2018
Lync Server 2013 Cumulative Update 9 KB 4019183 July 2017
Lync Server 2013 Cumulative Update 8, Hotfix 4 KB 4014154 March 2017
Lync Server 2013 Cumulative Update 8, Hotfix 3 KB 3210166 January 2017
Lync Server 2013 Cumulative Update 8, Hotfix 2 KB 3212869 December 2016
Lync Server 2013 Cumulative Update 8, Hotfix 1 KB 3200079 November 2016
Lync Server 2013 Cumulative Update 8 KB 3175336 August 2016
Lync Server 2013 Cumulative update 7 KB 3140581 April 2016
Lync Server 2013 Cumulative Update 6, Hotfix 2 KB 3175338 January 2016
Lync Server 2013 Cumulative Update 6, Hotfix 1 KB 3121213 December 2015
Lync Server 2013 Cumulative Update 6 KB 3081739 September 2015
Lync Server 2013 Cumulative Update 5, Hotfix 10 KB 3064728 July 2015
Lync Server 2013 Cumulative Update 5, Hotfix 9 KB 3051951 May 2015
Lync Server 2013 Cumulative Update 5, Hotfix 8 KB 3031065 February 2015
Lync Server 2013 Cumulative Update 5, Hotfix 7.1 KB 3027553 December 2014
Lync Server 2013 Cumulative Update 5, Hotfix 7 KB 3018232 December 2014
Lync Server 2013 Cumulative Update 5, Hotfix 6 KB 3010028 November 2014
Lync Server 2013 Cumulative Update 5, Hotfix 5 KB 3003358 October 2014
Lync Server 2013 Cumulative Update 5, Hotfix 2 KB 2987511 Sept 2014
Lync Server 2013 Cumulative Update 5 KB 2937305 August 2014
Lync Server 2013 Cumulative Update 4 KB 2905040 January 2014
Lync Server 2013 Cumulative Update 3 KB 881682 October 2013
Lync Server 2013 Cumulative Update 2 KB 2835432 July 2013
Lync Server 2013 Cumulative Update 1 KB 2781550 February 2013

Lync Server 2013 Dev tools

Package name Release date
Unified Communications Managed API 4.0 Runtime Cumulative Update July 2013
Lync Server 2013 SDK February 2013
Lync 2013 SDK March 2014
Lync Server 2013 Debugging Tools January 2014
Lync Server 2013 Persistent Chat Server SDK October 2013
Unified Communications Managed API 4.0 SDK February 2013
Unified Communications Managed API 4.0 Runtime October 2012
UC Enhanced Presence Schemas for Lync Server 2013 October 2012

Pre-configured VHDs

The complete topology consists of seven 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 Release date
Test Drive - Lync Server 2013 - Part 1 of 3 September 2013
Test Drive - Lync Server 2013 - Part 2 of 3 September 2013
Test Drive - Lync Server 2013 - Part 3 of 3 September 2013

Lync Server 2013 tools

Package name Release date
Lync Server 2013 Meeting Migration Tool (MMT) September 2021
Lync Connectivity Analyzer (32-bit) RETIRED June 2017
Lync Connectivity Analyzer (64-bit) RETIRED June 2017
Lync Server 2013 Best Practices Analyzer October 2012
Lync Server 2013 Capacity Calculator July 2013
Lync Server 2013 Debugging Tools January 2014
Lync Server 2013 Management Pack May 2016
Lync Server 2013 Persistent Chat Resource Kit July 2013
Lync Server 2013 Planning Tool July 2013
Lync Server 2013 Resource Kit Tools January 2014
Lync Server 2013 Stress and Performance Tool March 2013
Lync Server 2013 Whiteboard Archiving Viewer February 2013
Lync VDI 2013 plugin (32-bit) October 2012
Lync VDI 2013 plugin (64-bit) October 2012
New Office Visio Stencil July 2016

Lync Server 2013 downloadable documentation

Package name Release date
Lync Server 2013 Documentation Help File August 2015

Lync Server 2010 update history

KB 2493736 is the master KB for Lync Server 2010. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.

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

Group Chat 2010 updates

Package name KB number Release date
Cumulative update for Lync Server 2010, Group Chat KB 2884623 October 2013
Cumulative update for Lync Server 2010, Group Chat Administration Tool KB 2884631 October 2013
Cumulative update for Lync 2010, Group Chat KB 2884627 October 2013

Lync Server 2010 developer tools

Package name Release date
Lync Server 2010 SDK November 2010
Lync 2010 SDK March 2011
Lync Server 2010 Group Chat SDK June 2012
Unified Communications Managed API 3.0 SDK May 2016
Speech Platform - Server Runtime Languages (version 10.2) September 2010
Unified Communications Enhanced Presence Schemas for Microsoft Lync Server 2010 November 2010

Lync Server 2010 tools

Package name Release date
IM an Expert for Microsoft Lync Server 2010 March 2012
Lync Server 2010 Best Practices Analyzer February 2011
Lync Server 2010 Capacity Calculator February 2012
Lync Server 2010 Planning Tool February 2011
Lync Server 2010 Resource Kit Tools May 2012
Lync Server 2010 Stress and Performance Tool March 2011
Lync Server 2010 Visio Stencil February 2011
Lync Server 2010 Web Scheduler April 2011

Lync Server 2010 downloadable documentation

Package name Release date
Lync Server 2010 Documentation Help File March 2012
Lync Server 2010 Welcome page October 2012
IM an Expert for Microsoft Lync Server 2010 Documentation March 2012
Lync 2010 Release Notes.aspx) January 2011
Lync Server 2010 Release Notes January 2011
Lync Server 2010 Planning Tool Readme January 2011
Lync Server 2010 Edge Server Reference Architecture Diagrams March 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 that contains all 19 chapters of the Resource Kit.

Group Chat

Package name Release date
Lync Server 2010 Group Chat November 2010
Lync Server 2010 Group Chat Admin Tool November 2010
Lync 2010 Group Chat November 2010

Trial software

Package name/Link Release date
VHD Test Drive - Lync Server 2010 (Eval) - Part 1 of 2 September 2012
VHD Test Drive - Lync Server 2010 (Eval) - Part 2 of 2 September 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.