To change a user's student enrollment to give them the Alumni role:
  1. Navigate to Core.
  2. Select Users  > Edit User Profile Data.
  3. Search and select the Past Student.
  4. Scroll to the lower left under System Information, and select Student Enrollment.
  5. Click Re-Enroll in the upper right corner.
  6. You can select the current day or original Enroll date.
  7. Select the original Grade Level they were enrolled in.
  8. Click Save & Exit.
  9. Next, click Withdraw in the upper right corner.
  10. Select Effective Immediately, for the same School Year they were originally withdrawn from.
  11. Enter the original Depart Date.
  12. Select the role of Alumni.
  13. Save & Exit.
  14. Click Confirm.

This will then make your Past Student an Alumni.