If you have a Program with ONE Class, the system can automatically assign Enrollees to that Class at enrollment. Here's how to set this up:
Head to the My Company page and scroll down to the Enroll Form heading. There will be a checkbox next to "Auto-assign enrollments."
Check this box to assign all new enrollments into a Class if the Program selected only has one Class.
NOTE: This can only happen if there is ONE Class in a Program.