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For students enrolling to courses via the course appeals process also works in a similar manner, and student enrolment information is only synced after the appeal process is completed, and the data is available on EduRec, before Canvas can sync the data from EduRec. Although, the appeals are approved by the departments, and the CourseReg system states that students have been enrolled, Edurec will still not show that the students have been enrolled (or dropped) until after the EduRec Sync period as stipulated by the Registrar's office.
You may refer to the Course Registration Schedule & Timelineas updated by the Registrar's office or contact the Registrar's office for details.
This process is similar to what it was in LumiNUS, and there are no changes to the time taken to sync to Canvas.