@natyjay Unfortunately, assignments are only able to be synced to SIS when there is at least one graded submission. Additionally, if the Missing flag is to be synced, a grade has to be included for the missing submission. If no grade is entered in Canvas, but default, the grade will be reported to SIS as a zero during a grade sync. If you want to grades to automatically sync as missing to SIS once the due date has pasted (even if you haven't graded any submissions yet), you may want to consider enabling and Automatic Missing Policy in your gradebook. This would automatically assign missing submissions a grade in Canvas that you have set in the policy when the due date is reached. This would also cause the missing submissions to have a score in Canvas--which would in turn allow the assignment and missing flags to sync to SIS at that time.