A CNAME record for the hostname defined in the TLS certificate is required for HTTPS data delivery. This step must be performed from your DNS service provider.
Multiple TLS Certificates: There is no guarantee that all of your TLS certificates will be placed on the same hostname. Therefore, it is important to keep track of the hostnames associated with each TLS certificate.
Dig
Use Dig to verify the DNS configuration for the hostname defined in the edge CNAME configuration.