Lync 2013 / SfB 2015 Client Update – July 2017

It’s been 3 weeks since our last update to the Office 2013-based Lync/SfB client. Today we go from 15.0.4933.1000 to … 15.0.4933.1000 – although the article (kb3213574) and other evidence – see below – confirms it’s 15.0.4945.1000.

What’s Fixed

This one contains a solo update:

Kb 4032344 Low Internet Explorer performance when Skype for Business 2015 add-in for Internet Explorer (OCHelper.dll) is enabled.

What’s New / Changed

Nothing documented.

Known Issues

You might think this update hasn’t worked, but it’s just not playing by the usual rules.

Help / About doesn’t show it and it’s not revealing itself to Get-CsConnections either.

It is however all good – it’s just only updated the Browser Helper Add-on – and you’ll find it in IE / Settings / Manage add-ons. (See below).


It’s been a big year for pre-req updates, but if you’re current (to 15.0.4933.100) 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-kb3213574-fullfile-x86-glb.exe)
  • x64 (lync2013-kb3213574-fullfile-x64-glb.exe)


I have all the pre-req’s already installed, so a reboot was not required.

Before / After



SfB 15.0.4927.1000 MSO 15.0.4719.1000 No change: SfB 15.0.4933.1000 MSO 15.0.4719.1000
Before-15.0.4945.1000 After-15.0.4945.1000-2

Here it is:


Revision History

8th July 2017: This is the initial post.

– G.

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