It would be extremely helpful if transfer course equivalents on a student record would flag as previously taken on the edit student enrollment page to avoid scheduling them in a duplicate course. On implementation, all our imported grades were recorded as transfer grades. On multiple occasions we mistakenly scheduled a student for a course they already took. Without pulling their transcript to reference while you're working with their schedule, it's impossible to know if they already took the course or not.
We also have many students who transfer in from other schools, and this is a similar issue when working with their schedules.