Microsoft Skype for Business 2015 is a communications tool which provides services such as audio/video conferencing, Instant Messaging (IM) and Voice over Internet Protocol (VoIP). These services can all be accessible from the Internet, or from an internal network. Microsoft Skype for Business 2015 allows companies to enhance collaboration amongst employees.

A number of enhancements have been made in Microsoft Skype for Business 2015. The network topology setup is quite similar to the previous version (Lync 2013) but with a number of small differences. The Director role is still optional and is not recommended. Less servers are needed because front-end servers can now take the role of Director. A new role has been added called the Video Interoperability Server (VIS) which acts as an intermediary between third party teleconference systems and the Skype for Business 2015 deployment.