Here are the basic settings: Protocol: xmpp connect port: 5222 file transfer proxy: proxy.eu.jabber.org connection security: use encryption if available The only problem we had was with the self-signed cert. I had to download the jabber x509 certifi...

@Hailey, Thank you for that excellent answer!  Very helpful indeed.

I've seen that reply before. That does not answer this very simple question, nor does it tell me what to do to find the answer.  Can you please try and be more helpful.  Thanks!