Johann Sprenger - You can turn off the camera and mic while you are in your dashboard if you have the preview enabled. There is a mic icon in the top right of the preview that will mute the mic once clicked. You should see the circle turn red once its muted. While hovering your mouse over the camera preview, 3 dots should appear in the top left. If you click that, you can see "turn off my camera" and "mute myself." Please note that these settings will carry over into the call if you do not re-enable them before starting the call, but you can follow the same steps to re-enable them during the call if you forget.