Synchronizing a user's progress in a course might be required sometimes.
The most common case you would have would be when your users have completed the course and later you decide to enrich the course's content by adding more lessons or units to it.
To calculate the new user progress and score on the course now, you need the users' progress to be synchronized. To do so, login as administrator and from your Administration dashboard visit the course and then the tab Users (1) within the course.
Then, you shall find a tabular list of all the course users along with details of their status, score, progress etc on the course. To synchronize the user's progress click on the synchronize option (2). The progress/score etc of the user will be re-calculated automatically and accordingly to the new content of the course.