If you're using Default Domain Validation (DV) certificates, you can generate the domain validation challenges ahead of setting hostnames for your property. Ordinarily, you get the challenges when you add hostnames to a property version or add hostnames to a property's hostname bucket. This operation returns the validationCname object that you use to validate the certificate's domain. For each requested property hostname, create a new CNAME record in the DNS configuration and map the object's hostname to the target.

Note: If you're using a new account, first register it on the Akamai network by activating any property version on either staging or production. Otherwise, your attempts to generate certificates will fail with a 403 error.