Most managed servers will have all the prerequisites needed to install and use an SSL Certificate purchased via whmcs.com. In the event it does not, use the following links to download the Intermediate and Root CA Certificates which correspond to the brand of certificate purchased:
- RapidSSL: https://knowledge.digicert.com/generalinformation/INFO1548.html
- GeoTrust: https://knowledge.digicert.com/generalinformation/INFO1421.html
- All other DigiCert certificates: https://www.digicert.com/kb/digicert-root-certificates.htm
Installation instructions for individual Operating Systems and Platforms are located at https://www.digicert.com/kb/ssl-certificate-installation.htm
