The easiest way to setup a domain with the AgentID Sites is to contact your registrars (where you purchased your domain from) support team.
The following is an email template to send to your registrars support team:
'Please change the DNS records on my domain name [ENTER DOMAIN NAME HERE] to the following Records:
When the DNS change is successfully made please send me a confirmation email. Thank you! :)'
Once you receive that confirmation email, you can enter in your domain in the setup wizard and finish the setup of your AgentID Site!