There are two options:

1) Use WebSiteX5's inclusive hosting and book the desired domain there (if available) or redirect an external domain to WebSiteX5's inclusive hosting via DNS.

Advantage: The parameters for FTP, database, and email are usually already configured.

Disadvantage: With multiple domains and websites, it is more expensive, as a separate web hosting package is required for each domain.

2) Use external web hosting and book the desired domain there.

Advantage: With multiple domains and websites, it is cheaper, as one web hosting package is usually sufficient for several domains.

Disadvantage: The parameters for FTP, database, and email must be determined by the web host itself and correctly entered into WebSiteX5.

Hi Tremblay, 

as Daniel mentioned, you can register a custom domain, which is an option available upon payment. You can proceed from this page: https://helpcenter.websitex5.com/en/community/users/1396263/webhosting

Thanks!