These concepts are addressed in this TechNet article. In these scenarios either server certificate revocation checking needs to be disabled on the workstations or the RootCA certificate configuration needs to be modified.

It is important to be aware that once deployed this feature may still not function on any Skype for Business clients on workstations which are not joined to the same domain as the SfB deployment.

This server is not a SfB role but is actually part of the Office server family and is leveraged by Skype for Business as well as other Microsoft server products like Exchange and SharePoint. This is because the deployed environment does not yet include an Office Web Apps Server which is required to support that functionality. When testing various Skype for Business meeting modalities in the last article a specific feature was briefly mentioned which was not yet available: the ability to use the Present PowerPoint Files option from the Present menu. The environment and example steps outlined here are a continuation of a series of related articles covering the installation and configuration of a Standard Edition topology of Skype for Business Server 2015. This article addresses the deployment of a single Office Web Apps 2013 Server and subsequent integration with an existing Skype for Business (SfB) Server 2015 environment.

Skype web app install