public static boolean isOtherResourcePresenceEnabled() {
        return JiveGlobals.getBooleanProperty("xmpp.client.other-resource.presence", true);
    }
Returns true if the session should broadcast presences to all other resources for the
current client. When disabled it is not possible to broadcast presence packets to another
resource of the connected user. This is desirable if you have a use case where you have
many resources attached to the same user account.

@return true if presence should be broadcast to other resources of the same account
xmppserver/src/main/java/org/jivesoftware/openfire/SessionManager.java