Lync 2013 / SfB 2015 Client Update – March 2018

The February update broke us through through the FIVE THOUSAND BUILD mark to hit 15.0.5007.1000, and our March update (Kb 4018290) nudges us higher to 15.0.5015.1000.

What’s Fixed

This update fixes the following issues:

  • Kb 4089881 Outlook freezes when creating a Skype meeting in Skype for Business 2015 (Lync 2013)
  • Kb 4089880 File transfer is allowed in meetings even when EnableExternalP2PFileTransfer is set to false in Skype for Business
  • Kb 4089885 Upcoming meetings keep missing from the Meetings tab in MSI-based edition of Skype for Business
  • Kb 4089883 Wrong user name in error message when a call transfer isn’t completed in Skype for Business 2015 (Lync 2013)

What’s New / Changed

David Paulino reports that this update now lets a sysadmin prevent users uploading files to external conferences. Here’s an extract from that article:

Before this update the Lync/SfB Client didn’t had[sic] a setting that could prevent file upload to external meetings.

We can configure the EnableExternalFileTransferInConference setting with Inband Policy or Register Key

Inband Policy

$a = New-CsClientPolicyEntry –Name “EnableExternalFileTransferInConference” –Value $false
Set-CsClientPolicy –Identity <Policy Name> –PolicyEntry @{Add=$a}

After disabling the upload the users won’t be able to upload file to External Conferences.

[Check David’s article for the PowerShell and command-line registry alternatives for the Office 2013 and also Office 2016 clients]

Known Issues

Nothing documented.


We saw a couple of pre-req updates last year, 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-kb4018290-fullfile-x86-glb.exe)
  • x64 (lync2013-kb4018290-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 15.0.5007.1000 MSO 15.0.4981.1000 SfB 15.0.5015.1000 MSO 15.0.4981.1000
BeforeKb4018290-March2018 AfterKb4018290-March2018

Revision History

15th March 2018: This is the initial post.


– G.

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