This tutorial will cover how to create a sub-server, allowing for a second domain to be setup within a given Virtual Server account.
It assumes you have first logged into Virtualmin.
Choose the domain for which you would like to add the sub-server. You can do that by selecting the domain name from the drop-down box on the top-left.
Click Create Virtual Server.
Click Sub-server.
Enter the Domain Name and Description for the Sub-server.
Click Create Server.