You can take remote control of 2 machines in a same session by following steps-

  1. Go in session where you want to add 2nd machine
  2. Click on this button, This is "start new activity button

  3. You'll see Guided Path list or connection code (if GP is disabled)

  4. Share connection code with customer and remote session will start
  5. You can switch between these two machine with same "plus" button