1. Login to your Member Control Panel: https://unionhost.com/cp/clientarea.php

2. Once logged in to your Control Panel,

go to ' Domains' (3rd line Menu) - 'My Domains' - 'Active Icon' - 'Name Server'

3. you need to change the name servers of domain to the Required Name servers listed below:

Choose "Use custom name servers (enter below)" option.

Login to your cPanel and click Addon Domains, under Domains. There are three fields cPanel asks for when creating an addon domain:

You need to add your Primary domain name server to your addon Domain and it should not be a Sub domain or parked domain .