As you prepare for the end of your course, you can send students a course farewell email message.
To assign a final grade to each student enrolled in a course, you generate grades after the Course End Date and Time have passed. See Generate Grades for Enrolled Students (All Courses).
The final grades of a student in the course and the grading configuration you set in Studio are used to determine whether the student has earned a Certificate of Mastery for the course.
The process of issuing certificates is completed at edX: work with your edX program manager to schedule a date to issue certificates and complete this process.