I checked the related settings in Skype for Business again on my side, but did not find a settings to control this. Hi Jk 43jk43, Thanks for posting the query you encounter in our forum. To stop Skype for Business or even Lync from starting automatically do the following: Click the Drop Down arrow next to the Gear icon, then Tools and Options. Stop Skype for Business from Starting Automatically. In other words, Skype UWP users simply need to logoff from within the app. We won't sign you in automatically after that. If you prefer not to be signed in automatically on Skype for Windows 10, you can sign out from the app. To maximize Skype UWP you will just need to click on the application icon. If you close your computer without signing out of the Skype UWP application, then on next computer boot, Skype will auto run in the background. The classic Skype for Windows Desktop is a Win32 application, Skype UWP is not.

Windows apps are not managed the same way as a Win32 application.