Microsoft Skype for Business 2019 is a communications tool that provides services such as audio/video conferencing, Instant Messaging (IM), and Voice over Internet Protocol (VoIP). You can access these services from the internet, or from an internal network. Microsoft Skype for Business 2019 allows companies to enhance collaboration amongst employees.

A number of enhancements have been made in Microsoft Skype for Business 2019. The network topology setup is quite similar to the previous version (Skype for Business 2015) 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. The Persistent Chat role is now deprecated as is the support for Extensible Messaging and Presence Protocol (XMPP) on the Edge Servers.