Be aware that this solution for Quick Assist is to turn this secure desktop feature off, lowering security a little. This is due to UAC Secure Desktop feature kicking in.
While working on a project at a customer, we noticed that when using Quick Assist or TeamViewer, as we run an application or command as admin in a remote session, the UAC prompt would turn up on the computer, but the remote session gives a black screen. By allowing a trusted friend, family member, or Microsoft support person to access your computer, you can troubleshoot, diagnose technological issues, and receive instruction on your computer. Quick Assist is a Windows 10 application that enables two people to share a device over a remote connection.
This article will describe how to fix the black screen in Quick Assist or Teamviewer with Intune.
