This cumulative update fixes the following issues: 5030764 Emergency Mitigation Service for Skype for Business Server. The cumulative update also fixes the issues that were previously described in the following Microsoft Knowledge Base articles:

Summary. This security update resolves vulnerabilities in Skype for Business and Microsoft Lync Server. The most severe of these vulnerabilities could allow elevation of privilege if a user clicks a specially crafted URL.

How to install the update. To install this cumulative update for Skype for Business Server 2015 (Web Components Server), 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. Prerequisites.

This cumulative update contains the following fixes: A shortcut method for the new MACP is added to the Start menu. OAuth support for Skype for Business Server 2019 Web App. How to install the update.

How to install the update. To install this cumulative update for Skype for Business Server 2015 (Web Components Server), follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064).

How to obtain the cumulative update. To obtain this update, submit a request to Microsoft Customer Service and Support through the following Microsoft website: http://support.microsoft.com/contactus/?ws=support. Prerequisites. There are no prerequisites for installing this cumulative update. Registry information.

This cumulative update replaces the June 2016 cumulative update 6.0.9319.259 for Skype for Business Server 2015, Web Components Server. Update package installation information.

To install this cumulative update for Skype for Business Server 2015 (Web Components Server), follow the steps that are described in the following article in the Microsoft Knowledge Base:

To install this cumulative update for Skype for Business Server 2015 (Web Components Server), 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. Prerequisites.

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: Skype for Business Server 2015, Standard Edition server. Skype for Business Server 2015, Enterprise Edition - Front End server and Back End server.