There is a minor error in the manual for Managed DNS, v 2.8.3, page 17/40
The URL is https://managednsservice.com/ <-- This URL does not match the certificate.
Either drop "s" in the https:// (and let the redirect take care of it), or change the URLs to http://
-- If I were still loyal to the Goa'uld, you would know it. It would be immediately apparent as I would not hesitate to kill you where you sit. -- Teal'c