...
XMPP is an open communications standard, supported by public chat services such as Google Talk and Jabber.org. Many companies run internal XMPP-compatible servers. And To send XMPP notifications, an administrator will need to configure the XMPP publisher:
...
To receive XMPP notifications, users will need to have an XMPP Id set on their user profile. . This Id will need to be on the same XMPP server that is defined in the publisher.
No configuration for private messages is required.