Using the Certificates Interface I created a private key and certificate signing request (CSR). I then sent the private key and the CSR to Thawte for signing. After the certificate had been signed, I installed the certificate using the Certificates Interface but I did not upload a CA certificate. (The Certificate Interface indicated that it is not required.) Everything looks good but the server is still sending the Default Certificate when visitors access the site using HTTPS. 1. Do I have to upload the CA certificate? 2. What is a CA certificate? 3. How do get the CA certificate?