July 5, 2017, update for Skype for Business 2015 (Lync 2013) (KB3213574)

Microsoft has released an update for Microsoft Skype for Business 2015 (Lync 2013) on July 5, 2017. This update also includes the new Skype for Business client. The version number of this update is 15.0.4945.1000.

In addition to the release of the new client, this update fixes a list of issues. Before you install this update, see the prerequisites.

Get update KB3213574 for Skype for Business 2015 (Lync 2013)

The update is available for download from the Microsoft Download Center.

32-bit

Download the 32-bit Lync update package now.

64-bit

Download the 64-bit Lync update package now.

Notes

The download page will display this update as for Lync 2013.
After you apply this update, Lync 2013 will be upgraded to Skype for Business.

Get the general information about the new experience in Skype for Business.
You can still use the Lync client user interface (UI) after you apply this update for Skype for Business 2015 (Lync 2013).

Get the general information about how to switch between the Skype for Business and the Lync client UI for Microsoft Office 365 users and Lync Server 2013 users.

How to install the update

Prerequisites

Before you install this update, you must install Microsoft Office 2013 Service Pack 1 (KB2817430).

Additionally, to install this update, you must have the following updates installed.

Update	Download link
May 2, 2017, Lynchelploc update for Skype for Business 2015 (Lync 2013) (KB3191873)	Download the 32-bit Lynchelploc update package now. Download the 64-bit Lynchelploc update package now.
May 12, 2015, security update (KB3039779) for Skype for Business	See Knowledge Base article 3039779.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Restart information

You may have to restart the computer after you apply this update.

Issue that this update fixes

This update fixes the issue in which you experience Low Internet Explorer performance when Skype for Business 2015 add-in for Internet Explorer (OCHelper.dll) is enabled.

More information

File information

After the update is installed, the English version of this update has the file attributes, or a later version of the file attributes, that are listed in the following tables.

This update may not contain all the files that you must have to fully update a product to the latest build. This update contains only the files that you must have to correct the issues that are listed in this article.

x86 Lync-x-none.msp

x64 Lync-x-none.msp

The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office. See Office System TechCenter.