Changing the name of a domain in Plesk 12 can be completed in a few easy steps:
- Login to the Plesk control panel
- Select the subscription that contains the site you want to rename
- Click the "Open in Control Panel" link for that subscription
- Click on the "Hosting Settings" link next to the domain you'd like to rename
- Change the "Domain name" field to your new domain and click OK.
Much needed improvement with Plesk.