In order to enable the setting to generate unique certificate number and URL, you can:
Click on “Settings” in the side navigation bar.
Select “General”.
Once done, click on the “Course” tab
Enable the option - "Use shorten URL by bit.ly for certificate" and "Save"
Click on Save
Once this is done, you can:
Click on “Settings” in the side navigation bar.
Select “Certificates”.
You can either create a new certificate or edit an existing certificate.
Use the certificate Short codes from the list in your certificate template as shown in the image below