Skype for Business Server 2015 Cumulative Updates (CU) List

With the release of Cumulative Update 0.1 (June 2015) i thought id create a Skype for Business Server Cumulative Update list and release dates.

Something i often search for with Lync 2010 and Lync 2013 and perhaps others may find helpful in the future.

Updated for CU1 Nov 2015 and renamed previous CUs are 0.x

For DOWNLOADS of all CUs click here

CU Number Version Number Date Download Links
RTM 6.0.9319.0 May 2015
CU 0.1 6.0.9319.55 June 2015
CU 0.2 6.0.9319.72 September 2015
CU0.3 6.0.9319.88 October 2015
CU 1 6.0.9319.102 November 2015
CU 2 6.0.9319.235 March 2016
The March 2016 cumulative update adds the Active Directory Authentication Library (ADAL) feature to Microsoft Skype for Business Server 2015. For more information about ADAL

Issues resolved
The March 2016 cumulative update resolves an issue in which Windows 10 users who use Edge can’t join a meeting from Skype for Business Web App (KB 3095143).

CU 3 6.0.9319.259 Added Busy on Busy Options and bug fixes.
CU 4 6.0.9319.272 November 2016

Also when the MAC client was released it said this was required to enabled them to join without Reverse proxy but i cant see this listed on the KB.

CU4 HF 1 6.0.9319.277 February 2017


  • Fix for SfB Installer on Server 2016 ! So it wont be long now people !
  • E911 fix for non windows auth clients
  • Push notification support for iOS and Android
  • Presence and contact card updates
  • Skype web sdk update for accepting across-domain anonymous meeting join requests
CU5 9319.281 17th May 2017

Alot of issues resovled here too many to list. Check out a summary here


7 thoughts on “Skype for Business Server 2015 Cumulative Updates (CU) List

  1. Ian Wright says:

    This is fantastic Martin. Microsoft frustrate me as sometimes I need to build labs for customer POCs and cannot get old versions!

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