[jadmin] Allow user from another jabberd server to join conference

[Hendra]

Hi,

Here's my situation: I have 2 jabberd2 servers running in 2 different 
location connected via VPN. Let's just say  its jabber.romeo.acme.com 
and jabber.juliet.acme.com
Users belong to each server can communicate to each other without any 
problem, as in john at jabber.romeo.acme.com can chat with 
sue at jabber.juliet.acme.com, and of course users within the same server.
In jabber.juliet.acme.com I have mu-conference installed up and running 
at conference.jabber.juliet.acme.com, so everyone in 
jabber.juliet.acme.com can join the chat room in this server. However I 
can't invite user from jabber.romeo.acme.com  to join the chat. This 
what i got in the log:

.. jabberd/s2s[22657]: [6] [xxx.xxx.xxx.xxx (ip of jabber.romeo), 
port=5269] outgoing route 
'conference.jabber.juliet.acme.com/jabber.romeo.acme.com' is now invalid

Is there any special configuration to allow conferencing between 
multiple jabberd2 servers? Anyone in this situation before? Thanks in 
advance.

Rgds,
Hendra