Description of the security update for Skype for Business 2016: July 10, 2018

Applies to: Skype for Business 2016


This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8238 and Microsoft Common Vulnerabilities and Exposures CVE-2018-8311.

Note To apply this security update, you must have the release version of Skype for Business 2016 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home (see Determining your Office version).

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

More Information


To apply this update, you must have either of the following updates installed:

  • 3203472 August 1, 2017, update for Office 2016 (KB3203472)
  • 4011099 September 5, 2017, update for Office 2016 (KB4011099)

Security update deployment information

For deployment information about this update, see security update deployment information: July 10, 2018.

Security update replacement information

This security update replaces previously released security update 4011159.

File hash information

File name SHA1 hash SHA256 hash
lync2016-kb4022221-fullfile-x64-glb.exe 9C13BC8EE21EF54B34CBBD4BE273C5816DA31EAE 5898563602812FE3238313D09B165884D08D3B028FD6BC03F60411BC0EA8025C
lync2016-kb4022221-fullfile-x86-glb.exe D9FDA90E7F715ABFD34A0C2970204C1AE150A235 AA1319767D569DA20E775BE6FD5FC42EFC0BA31D225F7C927D05F30197189795

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. 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.

How to get help and support for this security update

Help for installing updates: Windows Update: FAQ

Security solutions for IT professionals: TechNet Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support