Plesk - NameServer
Process of Adding & Editing Name Server.
Step 1 - Log in to your Plesk control panel.
Step 2 - Go to the “Websites & Domains” tab and choose which domain you’d like to secure.
Step 3 - Click on Domain name which you want.
Step 4 - Click on DNS Settings.
Step 5 - Click on Domain name of name server.
Step 6 - Update the Name Server and click on Apply & OK.