The Active Directory Federation Services (AD FS) proxy role service is installed on this server. When the OS upgrade is complete, ...

The Active Directory Federation Services (AD FS) proxy role service is installed on this server.  When the OS upgrade is complete, you will need to install the Web Application Proxy role service on the Remote Access role and then add it to a Windows Server 2012 R2 or later AD FS farm. For more information see http://go.microsoft.com/fwlink/?LinkID=518376