Lync 2013 / SfB 2015 Client Update – December 2017

Our November update took us to 15.0.4981.1000 and today Kb 4011284 nudges us up a few builds to 15.0.4989.1000.

What’s Fixed

This update fixes the following issues:

  • Kb 4054669 Can’t set the maximum number of contacts for a Skype for Business 2015 (Lync 2013) user
  • Kb 4054671 “The requested operation was blocked by policy” error when signing in to Skype for Business 2015 (Lync 2013)
  • Kb 4054670 Delegates and call forwarding settings are removed in Skype for Business Basic for Office 365 ProPlus users

What’s New / Changed

Nothing documented.

Known Issues

Nothing documented.


It’s been a big year for pre-req updates, but if you’re current then you’re OK today.

If however your patching isn’t to current you’ll need to check you have *all* of these pre-req’s. The Office 2013 SP1 requirement still applies if you’re using Outlook 2010. (Lync 2013 in all of its flavours – e.g. Lync Basic – is still a component of Office 2013).



Current Version


Update for Office 2013 (KB3054853) (NOTE 1 BELOW) 1.0 9 June 2015
LyncHelpLoc (kb3191937) 1.0 22 May 2017
Microsoft Office 2013 Language Pack Service Pack 1 (KB2817427) 1.0 13 February 2014

NOTE1: “You do not have to apply update KB3054853 if you applied the April 14, 2015, update (KB2889923) or the May 12, 2015, security update (KB3039779) for Lync 2013 (Skype for Business)”


This is the client fix itself:

  • x86 (lync2013-kb4011284-fullfile-x86-glb.exe)
  • x64 (lync2013-kb4011284-fullfile-x64-glb.exe)


I have all the pre-req’s already installed, had exited the client before we started & was not prompted for a reboot.

Before / After



SfB 15.0.4981.1000 MSO 15.0.4971.1000 SfB 15.0.4989.1000 MSO 15.0.4971.1000
Before-kb4011284-Dec2017 After-kb4011284-Dec2017

Revision History

6th December 2017: This is the initial post.


– G.

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