I can't find this info anywhere. We have two 2003 domains that are being upgraded. We are introducing new 2012 servers, joining the domains, making them domain controllers, then extending the schemas and eventually raising the functional level to 2012.
However, we can't do them at the same time. My question is, can a 2012 domain establish a two way trust with a 2003 domain? The two domains do share resources.