Configure preferred domain
You can use the "Preferred domain" setting to specify whether Plesk should perform a redirect to the preferred domain. It makes sense to activate this setting if the associated web application cannot perform an independent redirect.
Background
Many web applications differentiate between the protocols http://, https:// and whether the domain is called via www. when a website is called. To avoid duplicated content, you should choose one of the four possible variants and redirect the other three cases to the correct domain using the "Preferred domain" setting via permanent redirection (301) instead.
Customize preferred domain
First log in to the Plesk-Control-Panel via our Customer Center and navigate to your store domain.
Then select the Hosting menu item in the Hosting and DNS tab.
Select your desired variant in the Preferred domain setting. Here: www.creoline-demo.com. After you have saved the changes, you can use our free HTTP redirect tool to check whether the redirects are working properly.