It is 100% possible to use any domain registrar with our websites. All you need to do is setup the domain name from the registrars side.
First, visit your Admin Panel > Menu > DNS Manager. Enter your domain name. If you know you have additional DNS records for other services such as email or voice server then enter them here too. Press the save button.
Then, change your DNS name servers (this is done through your registrar) to:
It is very important you change your name servers after you press the save button! If you use GoDaddy, this article explains how to do this:https://support.godaddy.c ... ed-with-us?locale=en
Your domain name will become active within a few hours.