Description of the security update for Skype for Business 2015 (Lync 2013): July 9, 2019

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?).

Prerequisites

Before you install this update, you must install Microsoft Office 2013 Service Pack 1 (KB 2817430).

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

Update	Download link
June 13, 2017, Lynchelploc update for Lync 2015 (Skype for Business) (KB 3191937)	Download the 32-bit Lynchelploc update package now. Download the 64-bit Lynchelploc update package now.
June 9, 2015, update for Office 2013 (KB 3054853) Note You don't have to apply update 3054853 if you have applied the April 14, 2015, update (KB 2889923) or the May 12, 2015, security update (KB 3039779) for Lync 2013 (Skype for Business).

Security update deployment information

For deployment information about this update, see security update deployment information: July 9, 2018.

Security update replacement information

This security update replaces previously released security update 4461487.

File hash information

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.