This article summarizes the enable auto enrolled attendee option available within the company or institution settings.
Within the Edit Institution / Company settings there is an option to Enable Auto enrolled Attendee. With this option enabled all attendees that match your criteria will be added to your Attendee list.
This is a good way to ensure that all matching attendees are added to your Attendee list and not potentially missed. From the Attendee list you will have the ability to better filter, shortlist and reach out to matched attendees.
Stand Backend Settings:
Auto Enrolled Attendees: