From the main Reseller menu, Server Manager → select the “Nameservers” link. You will see a page that looks like this:
From this page you can set the Nameservers that will be assigned to new users. To delete Nameservers, You need to checkmark the Nameserver and click on “Delete”.
Need more help?
Please contact your hosting company for more assistance, or visit the DirectAdmin support forum at https://forum.directadmin.com/.