TalentLMS allows you adjust the certification duration for any course at any time. 

If you update the certification duration, users who completed the course prior to the change will need their certificates updated. 

Here is how to synchronize users with your changes: 

1. Sign in to your TalentLMS account as an Administrator or an Instructor and open a course from the Courses menu. You’ll be redirected to the Users tab (1) of the course.  

2. Hover over any user who has completed the course and click Preview certificate (2). 

3. In the following dialog box, you can see this user’s current certificate. Click Update (3) to update the current certificate (for this user only), or click the drop-down symbol next to it and choose Update all certificates for this course (4).