Get Screen Capture
Allow screen capture to be taken from background task OR through mdm protocol. This is useful for techs using mdm systems - for example if a user has an issue and calls their tech support, they can request a screen capture and help them resolve.
Raimund Popp commented
which keys may i press on UWP Desktop?
how to start screen capture by an app for remote-desktop?
Press Windows + Power in WP8, or in Windows Phone 8.1 Vol Up + Power