I set up our course months ago and set enrollment that I could add an email to enroll a student and they'd receive an email from Canvas having them follow the directions to register. For many of my students this worked fine. Today, a student was told they had to enter a Join Code. I never created one. In order to get them enrolled, I had to change to self-enrollment and send them the secret URL.
Is there a way I can go back to my enrolling them (via People--> Add People) in the dashboard without them having to have a secret URL or join code? And would that mess up those already enrolled and active in the course?