To set up a domain alias in Plesk, perform the following steps:
1 - Logged in to Plesk, https://your domain name:8443.
2 - Go to Websites & Domains and run the Add Domain Alias wizard.
3 - Specify the domain for which you are creating an alias (the primary domain) and the alias’s domain name, for example alias.tld, and set up the following:
- Synchronization of DNS zone with the primary domain
- Mail service
- Web service
- Redirect with the HTTP 301 code
- Java web applications
