Subdomain off primary for each account?

Suppose our host/domain is cpanel.techlard.com (completely fictitious) We sell webhosting to 3 clients and set up the following accounts and domains: account: soiljoe domain: soiljoe.biz account: mathslang domain: mathslang.org account: fuzzlodge domain: fuzzlodge.com What I want to know is how you would set up subdomains off of techlard.com for each account: soiljoe.techlard.com mathslang.techlard.com fuzzlodge.techlard.com So example: soiljoe.techlard.com will give you the same site as www.soiljoe.biz website, whether soiljoe.biz domain is registered or not. Emailing joe@soiljoe.techlard.com will go to joe@techlard.com mailbox.

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• Does cPanel have an automatic way of doing this for each new account created?
• Is there a way of doing it manually within cPanel on a per account basis?

I see an option in the WHM under Server Configuration -> Tweak Settings -> Domains called "Allow WHM users to create subdomains across accounts" - thats kind of what we are doing but I don't want the users to be able to create those, just the root or ideally automatically set up when the new account is set up. I'm old school *nix but I'm new to root administration with cPanel. If you take cPanel out of the equation, you'd enter in an A entry into DNS configuration for the subhost, and you'd set up a VirtualHost using a ServerAlias for the subdomain. Great - but how to do this within cPanel's confines? Thank you in advance.