I am still receiving requests for this information.
So often, we hear about updates to Google Apps and assume they will just work. Unfortunately, many features don’t function properly until the necessary settings are adjusted in the Google Workspace Admin panel.
Google Classroom is now widely used for professional development and training. Teachers are enrolling in courses at outside colleges and universities that use Google Classroom, and many districts have students attending individual classes from other schools.
This makes it essential to understand how to configure Classroom to allow users from outside your domain to join.
It requires that the Admin Settings in Classroom be modified to do this:- Sign into admin.google.com
- Select Apps
- Select Google Workspace>
- Select Classroom
- Select Class settings.
- Select the EDIT icon. There you will find the options to modify access for those who can join classes in your domain, and which classes users in your domain can join.