Microsoft is testing a new feature in Windows 10 preview builds that integrates Skype’s Meet Now video conferencing feature directly into the operating system. Microsoft is betting that people would want this feature built directly into Windows 10. The Meet Now integration may not ever make it into a public release. If you wish to test this new feature now, you can join the Windows Insider program and install the latest preview build 20211 or later. If a user has uninstalled the Skype app, Windows 10 will launch a browser to create a Skype website meeting.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-is-getting-a-built-in-video-conferencing-feature/