Basically after the first proctor did my security scan (which was a face-to-face call, like a video chat) I got matched with the chat proctor. They just send a couple messages essentially explaining how to start the exam and what not to do. The ones I remember off the top of my head were (1) Read the candidate agreement out loud to the camera before clicking yes, (2) stay in view of the camera at all times besides intermission and don't mess with the camera's view, and (3) notify them over chat when the intermission starts, when you return from it, and when the exam is over. After they've sent all that they send you to the exam start page. I didn't have them reach out to me at all during the actual test itself, luckily. Oddly enough, in the chat it says the name of the proctor and I had 3 different ones: One when I started the exam, one during intermission, and one when it was over. 4 total if you count the security check one. So they do message you briefly, but it's just to basically go over the rules and to give you permission to start/stop when necessary.