Can't map a domain to a subsite set in multidomain

Hello dear support staff.
I'm creating a multisite network on
My issue is that after adding another domain ( as selectable in the multidomain, tried to map the same domain to but I can't.

The error I get is that ( it is an invalid domain.

Is there some way to use the same domain as multidomain and map it to a subsite?

Thank you for your help!

  • Patrick

    Hi there @Jose

    Welcome to WPMU DEV, glad to have you aboard!

    First thing is the note that you may have missed at the top of the usage page:

    Multi-Domains is for sub domain installations only and will not work well for subdirectory installations.

    As for your question, the answer unfortunately is no. The Multi-Domains plugin simply makes an additional domain name available for selection when creating a subsite in an existing multisite network. So it basically maps that additional domain name to the main domain name of the network.

    That means that if you add to a network, you could create a subsite under, but it would in reality still be a part of the network.