Using Plesk, you can add a domain to your dedicated or virtual dedicated server. In order to add domain names, you will need to have a Plesk license that allows you to create multiple domains.

To Add a New Domain in Plesk

1. Log in to Plesk as admin.
2. Select Domains.
3. Click Add New Domain. The client selection page displays.
4. Select the client you want to create the domain for, and click OK. The domain creation page displays.
5. Select the www checkbox.
6. In the Domain name field, enter a valid domain name (e.g., domainnamegoeshere.com). If you enter a domain name that already exists, Plesk will ask you to change it.
7. Select the IP address that will be used to host this domain from the dropdown list.
8. If you want to set up hosting for this domain, check the Proceed to hosting setup check box.
9. Click OK.

For more information about setting up a domain in Plesk, you can take a look at the Plesk documentation on SWsoft's Web site:

Administering Domains
Creating a New Domain