Tested using phpunit and behat. Manual test (optional) Preparation As an admin go to Site administration / Plugins / Plugin overview Enable the Bigbluebutton Plugin Then go to Site administration / Plugins / BigBlueButton / Experimental features Ensure that Create guest access link for external guests (bigbluebuttonbn_guestaccess_enabled) is checked Test As an editing teacher or an admin in a course C1, create a new BigblueButton activity B1 In B1 settings, check the Guest access / Guest allowed in meeting checkbox In B1 settings, check the Guest access /User must be approved by moderators Save and display Join the meeting and wait for it to start In the original Browser's tab, click on the gray "Guest access" and add email Click on send Ensure that emails are sent (you might want to run cron to make sure the email are sent) Go to the Course > Reports > Logs and click on "Get theses logs" Ensure that you see the "Guest added" event and the emails are listed in the description.