The auto enroll process will run for the last time the day before a session begins, and the wait lists will be deleted the first day of the session. There are many May/Summer sessions with various start dates.
As a reminder, you can keep a record of who was on the wait list for a class, and in what order, by saving a copy of the list prior to its deletion. Also, if you or the instructor wants those formally wait-listed students to be able to register before other students, add departmental or instructor consent to that class section. Students would need to obtain a permission number before they register, and those permissions could be given to the students on the wait list first.
Instructors have received an email from ocmsched@umn.edu with this information as well.