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Issue that the cumulative update resolves

The cumulative update resolves an issue in which a call is disconnected when a user un-parks the call.

How to install the update

To install the cumulative update for Microsoft Skype for Business Server 2015, Unified Communications Managed API 5.0 Runtime, you must follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064) on computers that are running the following server roles:

  • Skype for Business Server 2015 - Standard Edition server

  • Skype for Business Server 2015 - Enterprise Edition - Front End server and Back End server

  • Skype for Business Server 2015 - Edge server

  • Skype for Business Server 2015 - Stand-Along Mediation server

  • Skype for Business Server 2015 - Director server

  • Skype for Business Server 2015 - Persistent Chat server

  • Skype for Business Server 2015 - Video Interop server



There are no prerequisites for installing this cumulative update.

Registry information

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

Restart requirement

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

Update replacement information

This cumulative update replaces all previously released updates for Skype for Business Server 2015.

Removal information

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

Sometimes, when you try to uninstall this cumulative update, you are prompted for the source CD. If this behavior occurs, insert the source CD, or provide the path where the source files can be found.

The global version of this cumulative update uses a Microsoft Windows Installer package to install the cumulative update. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

After the update is installed, the global version of this update has the file attributes, or a later version of the file attributes, that are listed in the following table:

File name

File version

File size





Not Applicable




Not Applicable








See the general information about the standard terminology that Microsoft uses to describe software updates.

Get the latest cumulative update for Skype for Business Server 2015.

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