WE ahve one domain that most users are in and everythig is working fine. But we do have a child domain that has its own exchange system. The exchange in the master domain is 2007 while the system in the child domain is 2003. We now have requests from users in the child domain that want to start using active synch. OWA works fine for them but I can not seem to get active synch to work. Any ideas or tricks that I need to know about to get this working.