I'm planning on running multiple group lessons with up to 20 students. They will all be paying in different frequencies (IE some buying lessons for two weeks, some for ten etc). Is it possible to generate a unique meeting link for each individual student, which expires when it should? This would mean no roll-call for me, as I know that if they are in the lesson, they must still have a valid meeting link. No-one could turn up to class with their old link. Possible? Or is their any other (automated as possible) way to gate my classes, other than monitoring who has run out of credits and kicking them out if needs be... Thanks

I've been teaching a class for three weeks from the US in Myanmar. Tonight, the teacher received the error code 3078 and could not enter the meeting.  I set up two more meetings with the same result. I have read all the error codes I could find online and could not even find 3078. What does it mean and does it ever go away?

I am the host of a meeting, and when 1 particular participant shares his screen, it mutes him and grays out his audio button. I can "request to unmute" the participant but when he clicks the accept button, it doesn't unmute him. After he stops sharing his screen, he is unmuted and can start talking again.  

Notable troubleshooting details: 

• He can screen share and talk on all his other calls.
• Other participants in my calls can share and talk with no issues. 
• I've tried making him the host and the problem persists.  
• It seems to only happen when we are in calls together. He doesn't have issues with his other calls, and I don't have issues with my other calls.