Website preview does not work with Quick Preview on an external domain name option selected under Tools & Settings>Website Preview. The following errors are displayed by the browser:
This site can't be reached
<URL>'s server IP address could not be found.
Try running Windows Network Diagnostics.
DNS service for the domain in question is not being managed in Plesk or the corresponding A record is missing. In order for Site Preview to work out of the box, a domain must have its DNS served by Plesk or have corresponding A record.
Apply one of the following solutions: