Question: How do I set up Openfire to be functional without a domain name?

I’m trying out Openfire and want to see how it works before figuring out what I will do for a domain.
Is there a way to set up the server so that someone can put in an address with the ip and not use a domain?

Thanks

An IP address is a valid domain name, so you can use that. It is highly unpractical, but for testing purposes it might be useful.

Do note that there is no practical way to change the domain name of Openfire without breaking things. You will need to reinstall the server if you want to have a different domain name.