I think you do not understand my question. I did not ask how to create Multi-User chat. I have asked is possible to create new service (subdomain) where MUC will be hosted. For example: chatId@.pcname, where which is present by default in Openfire is āconferenceā
MUC service creation such as āconference.server.imā is a server side thing IIRC, client software can only create or join MUCs on already created services on the server. The XEP doesnāt mention how /where those are created though (-;