Microsoft has released a cumulative update for Skype for Business Server 2015, Core Components. The version number of this update is 6.0.9319.591. This cumulative update fixes the following issue: Vulnerability exists when Skype for Business Server incorrectly handles OAuth token validation.

To install the cumulative update for Skype for Business Server 2015 core components, follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064). Note The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation.

To install the cumulative update for Skype for Business Server 2015 core components, follow the steps that are described in Updates for Skype for Business Server 2015 (KB 3061064). Note The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation.

To install the cumulative update for Skype for Business Server 2015 core components, follow the steps that are described in Updates for Skype for Business Server 2015 (KB 3061064). Note The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation.

This cumulative update fixes several issues in Skype for Business Server 2015, Core Components. The version number of this update is 6.0.9319.534. This cumulative update fixes the following issues: This cumulative update also fixes the issues that were previously listed in the following Microsoft Knowledge Base articles:

To apply this cumulative update, you must follow the steps that are described in Updates for Skype for Business Server 2015 on computers that are running the following server roles:

To install the cumulative update for Skype for Business Server 2015 core components, follow the steps that are described in Updates for Skype for Business Server 2015 (KB 3061064). Note The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation.

This cumulative update is for Microsoft Skype for Business Server 2015, core components. The version number of this update is 6.0.9319.514. This cumulative update fixes the following issues: This cumulative update also fixes the issues that were previously listed in the following Microsoft Knowledge Base articles:

This cumulative update is for Microsoft Skype for Business Server 2015, core components. The version number of this update is 6.0.9319.281. This cumulative update fixes the following issues: KB 4020997 Skype for Business Server 2015 Front-End service may crash in Windows Server 2016.

Microsoft has released a cumulative update for Microsoft Lync Server 2013, Core Components. The version number of this update is 5.0.8308.1134. This cumulative update fixes the following issue: Vulnerability exists when Skype for Business Server incorrectly handles OAuth token validation.