Instructions
You can let other people control your sharing session, contribute information, change a document, or demonstrate an application.
2) On the sharing bar at the top of the screen, click Give Control.
3) Click the name of a person under Attendees to give them access, or click Give Control Automatically, to automatically give access to anyone who requests control of your desktop.
4) To take back control of your desktop or program, click Give Control again.
5) If Give Control Automatically is selected, click to clear it. To take back control from a person, click Take Back Control.
Outcome
You have given or restored control of sharing session in Skype for Business.