I now use **Third Party Product**! Completely free and you can initiate a video call with someone and then share your screen with them. They can also share their screen back with you in the same video call. Besides the whiteboard in Teamviewer not working well and the audio being quite bad, I was beginning to have problems connecting with my students who use a Mac (and I don't). And you can see the amount of "helpful" replies I got here in the community forum lol. So I finally gave up on Teamviewer. I hope that helps!!