I wish you could help me clarify the following questions. Sorry if these questions seem obvious.
Are GroupChat data made persistent by Jabber servers? Let us assume that I create a group chat, add the participants John and Jane, and terminate my client. Next time I start my client, is it possible to restore this GroupChat somehow without storing the data locally?
What about MultiUserChat. Is there anything there that is persistent? Or do I have to take care of persistency myself? Are all data about the chat room (e.g. participants, admins, room info, banned participants, etc.) sent to all users or are they somehow managed by the server?