When restricting a user’s access to a customer Open edX site, we don’t delete the user – this can cause other issues. Instead, follow these steps:

1. Locate the user in the /admin page
2. Set the user to inactive
3. Change the email to something nonsensical. (user@company.com to user_oldemail@company.com)
4. Manually change the password to some long of gibberish
5. Save your changes