Hi. Can i change domain Host/Server to talkr.im.? If can, how can i migrate the database (list of user, etc)? (FYI, before this, i host it at my server domain) thank you.
How many users do you have? They all need to know your new domain name. If you have connections to external servers then the user subscriptions (roster) will likely break.
To change the domain name you want to create a database dump and replace the old domain name with the new one. It may be used quite often (rosters, history, …).