I recently upgraded to Moodle 2.3. Prior to this the default Quiz report displayed the ID number for each participant. After the upgrade, it displays the email address. Is there a simple way to get it to display the ID Number again?
In Moodle 23, as admin, go to Site administration > Users > Permissions > User policies. Scroll down to Show user identity. Remove the check mark for Email address and add one for ID number. Should give you what you want.