Need to Work Without Parking the Domain


I would like to know if Domain Mapping still works if we don't park the domains?

We are building out a network and we want people who join into the network to map their domains by themselves without any help from us.

So they would look at the instructions and then change their DNS to map their domains to their sub site. And after that it should be done. There should be no involvement on our part.

Is this possible? Please do let me know. Thanks.