I'm here in the dark with greenrenault. Pidgin does not seem to let me list current rooms, nor add rooms (that button's greyed out) even logged in to pidgin as the zimbra administrator. I haven't found any clear docs on how to control conf. rooms server side either.
By the way, is there ever going to be any way inside the zimbra webclient to access these conf. rooms (yes, i read the bug, but it's unclear if this is intended to be "fixed" or not), and is there or will there ever be a way to multi-chat or broadcast-message without conference rooms??
Pidgin 2.5.4 did not work as mentioned above, however Spark 2.5.8 client accessed and created a new conference room as per the instructions earlier in the thread perfectly. Perhaps a newer version of Pidgin is required?? This only seems to work for me, however, on zimbra 6.+ and while logged in to Spark as a zimbra administrator. Furthermore, it seems to only work using the zimbra root "server" (conference.zserver.com), not a mere zimbra "domain" (conference.zdomain.com).