I am using Zimbra Network Edition (Trail Pack). We have configured two domains i.e. one is the admin domain (eg. abc.com) and have created another domain (eg.xyz.com). If we try for Instant messenger between different accounts of admin domain, it is working fine. But, if we try to chat with two different domains accounts or else different accounts of that other domain i.e. xyz.com, then we are unable to chat. It shows some error if we try to accept the invitation i.e. :

The remote server could not be found.ERROR: <message to="hello@abc.com/zcs" from="check@xyz.com" type="error"><thread>chat-hello%abc.com-1</thread><error code="404" type="cancel"><remote-server-not-found xmlns="urn:ietfarams:xml:ns:xmpp-stanzas"/></error></message>

So can anybody guide about the same or else let me know if am I missing or have to do some sort of settings for that other domain.

Thanks in advance.