We have one Exchange Organization with two sites. One in the US and one in the UK. Both sites are running Exchange 5.5 and our domains separate but joined together by a Trust. Both domains are Windows 2003 Server. Both Exchange Sites replicate the Global Address List. Right now under Exchange 5.5 the sites are connected by Site Connector. Both sites are migrating to Exchange 2003. By having two forests and two domains, migrating to Exchange 2003 we cannot share the GAL. Is there a way to combine the forests? Have the UK domain join the forest that the US domain is in? That way there would be two domains in one forest and we would be able share the GAL. Any assistance would be greatly appreciated. Thanks, John