Anyway, I approved the certificate via email link this morning and received it in another email. So to continue with the process, the following steps were needed:
- Install the certificate to IIS 8 -- https://www.digicert.com/ssl-certificate-installation-microsoft-iis-8.htm
- Download the intermediate certificates from Geotrust/RapidSSL (provided in the email link)
- Install the intermediate certificates to Windows 2012 -- https://support.godaddy.com/help/article/4951/installing-an-ssl-certificate-in-microsoft-iis-8?countrysite=ph
- Do a quick SSL health check -- https://www.sslshopper.com/ssl-checker.html
And SSL is now running correctly.