Issue Problem adding Custom Error

[SteveC]

When adding custom error of type URL, it errors as in screenshot.

This is a recognised way of adding a custom error page in every other control panel, including PPA, so why not in Onyx?

 

[IgorG]

Have you tried to use the method from Plesk documentation - Setting Up Custom Error Pages on Windows Servers
Any errors?

 

[SteveC]

Yes, it works if I type the full URL - e.g. http://mydomain.com/404.asp

However, all other Windows control panels, and even IIS itself, just require the /404.asp - the domain is assumed.