December 2015 cumulative update 5.0.8308.941 for Lync Server 2013 web components server

To install the cumulative update for Lync Server 2013 web components server, use one of the following methods.

Method 1: Cumulative Server Update Installer

The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation. To use the Cumulative Server Update Installer, follow these steps.

Note If User Account Control (UAC) is turned on, you must start the Cumulative Server Update Installer by using elevated permissions to make sure that all updates are installed correctly.

1. Download the Cumulative Server Update Installer.
2. Run Cumulative Server Update Installer by using the UI or a command prompt.
   
   Note When you click Install Updates, the UI indicates which updates are installed.
   
   To run the Installer, run the following command:
   
   

   LyncServerUpdateInstaller.exe 

   Notes The following text describes parameters that you can use together with the LyncServerUpdateInstaller.exe command:
   
   
   • The /silentmode option applies all applicable updates in the background.
   • The /silentmode /forcereboot options together apply all applicable updates in the background. Additionally, these switches automatically restart the server at the end of the installation process, if it is necessary.
   • The /extractall option extracts the updates from the installer, and then it saves the updates in a subfolder that is named "Extracted" in the folder from which you ran the command.

After you run the Lync Server Cumulative Update Installer, you must update all the applicable back-end servers. See how to update the back-end servers.

Method 2: Microsoft Update

The update is also available from the Microsoft Update website.

Note After you install this update by using Microsoft Update, you must update the databases on the back-end servers. See how to update the databases on the back-end servers.

Prerequisites

There are no prerequisites for installing this cumulative update.

Registry information

To use one of the updates in this package, you do not have to make any changes to the registry.

Update replacement information

This cumulative update replaces the September 2015 cumulative update 5.0.8308.933 for Lync Server 2013 web components server.

Restart requirement

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

Update package installation information

To install this cumulative update package, install the WebComponents.msp package on computers that have one of the following server roles:

• Lync Server 2013 - Standard Edition Server
• Lync Server 2013 - Enterprise Edition - Front End Server
• Lync Server 2013 - Director Server

Removal information

To remove this cumulative update package, use the Add or Remove Programs item in Control Panel.

If you are prompted for source file when you install the update, insert the source CD or provide the path to where the source files can be found.

After you uninstall this cumulative update package, Internet Information Services (IIS) may stop running. This occurs because the ApplicationHost.config file is changed when you uninstall this cumulative update package.

Note The ApplicationHost.config file is located in the following directory:The following changes are applied to the ApplicationHost.config file:

• Duplicate entries are created in the sections after the <location path="Lync Server Internal Web Site" overrideMode="Allow"> and <location path="Lync Server External Web Site" overrideMode="Allow"> tags.
  
  After you uninstall this cumulative update package, these two sections resemble the following:
  
  <location path="Lync Server Internal Web Site" overrideMode="Allow">
  <system.webServer>
  <security>
  <authentication>
  <windowsAuthentication/>
  <windowsAuthentication/>
  </authentication>
  <authentication/>
  </security>
  <security/>
  </system.webServer>
  <system.webServer/>
  </location>
  <location path="Lync Server External Web Site" overrideMode="Allow">
  <system.webServer>
  <security>
  <authentication>
  <windowsAuthentication/>
  <windowsAuthentication/>
  </authentication>
  <authentication/>
  </security>
  <security/>
  </system.webServer>
  <system.webServer/>
  </location>
• The following entries are created before the </configuration> tag at the end of the file:
  
  
  • <location path="Lync Server Internal Web Site" overrideMode="Allow"/>
  • <location path="Lync Server External Web Site" overrideMode="Allow"/>

To resolve this issue, follow these steps:

1. Remove the duplicate entries in the two sections after the <location path="Lync Server Internal Web Site" overrideMode="Allow"> and <location path="Lync Server External Web Site" overrideMode="Allow"> tags. After you do this, the two sections resemble the following:
   
   <location path="Lync Server Internal Web Site" overrideMode="Allow">
   <system.webServer>
   <security>
   <authentication>
   <windowsAuthentication/>
   </authentication>
   </security>
   </system.webServer>
   </location>
   <location path="Lync Server External Web Site" overrideMode="Allow">
   <system.webServer>
   <security>
   <authentication>
   <windowsAuthentication/>
   </authentication>
   </security>
   </system.webServer>
   </location>
2. Delete the following entries at the end of the ApplicationHost.config file:
   
   
   • <location path="Lync Server Internal Web Site" overrideMode="Allow"/>
   • <location path="Lync Server External Web Site" overrideMode="Allow"/>
3. Save the ApplicationHost.config file, and then restart IIS.