Prerequisites To test this issue you'll need a Moodle that you have admin access to, can update code on and that is capable of sending emails. Having an admin account makes it easier to move through all of the test settings. If you don't have cli access to the instance make sure you have access to two separate admin accounts, in case you lock yourself out. Setup More detailed setup instructions for MFA testing can be found in MDL-78509 , the following setup are just the basics and there is some assumed knowledge. Apply the patch and upgrade Log into the site as an admin Navigate to: Site administration > plugins > administration tools > Multi-factor authentication In the factor table enable the email factor Scroll down to "General MFA Settings" Enable the "MFA plugin enabled" Checkbox Click save changes Tests Enter the username and password and click login for the admin user you set up the factors for View the email in an email client that renders HTML email Check the first line of the email says: Hello {username} 👋 Where {username} has been replace with the first name of your user Confirm the second line of the email contains your site full name and base URL Confirm the 6 digit code in the email is valid and logs you into Moodle when entered into the email form Log out of your Moodle.   Enter the username and password and click login for the admin user you set up the factors for Follow the 'this verification link' from the device you entered your username an password from Confirm you are logged into Moodle Log out of your Moodle. Enter the username and password and click login for the admin user you set up the factors for Follow the 'stop this login attempt' from the email Confirm you are presented with the 'unauthorised email' page Click continue Confirm you see the following message: 'This code has been successfully revoked. All sessions for [User fullname] have been ended. Email will not be usable as a factor until account security has been verified.'   Log into the site as an admin Navigate to: Site administration > appearance > logos Set a 'Compact logo' for the site Click 'save changes' Log out of your Moodle Enter the username and password and click login for the admin user you set up the factors for In the email received confirm that is now showing the compact site logo in the upper right of the email