How to change default certificate on Plesk 17

  1. Log in the Plesk admin portal, and navigate to Home >> Tools & Settings.
  2. In the Security group find the SSL/TLS Certificates menu and click it.
  3. Under List of certificates in server pool section click the Add button
  4. The Upload the certificate as text section upload the KEY, CRT, and -ca.crt, and click the Upload button.
  5. In the List of certificates in server pool section check behind the new certificate checkbox, and click the Make Default button