I'm trying to create an Exchange 2007 Resource domain with seperate default global address lists for each of the domains that are being serviced. Here is the problem: While it seems that Resource domains are supported and address list segregation is supported they are not supported at the same time. We have created an Exchange 2007 SP1 resource domain with the following characteristics: 3separateforests and AD domains: student, faculty and Datacenter (Datacenter is the resource domain) there are Forest Trusts configured from faculty & student domains to the Datacenter domain Linked mailboxes from Datacenter to the other domain are in place and working All domains are Windows 2003 Native. The Datacenter & Student domains have only Windows 2008 R1 DC's Users in the students domain must not have access to resources located in the faculty domain There is a requirement that users in the students domain get a particular GAL, while users in faculty domain see another list. Each domain should be able to see other address lists by choosing it from a drop down list. In MS white paper located here http://technet.microsoft.com/en-us/library/bb936719(EXCHG.80).aspx#NotRecAddress list segregation is detailed however the following statement is made: Note: We recommend that you maintain all virtual organizations in a single forest and domain. Tried to use the document above to configure segregation anyway and found that since Exch 2007 uses only Universal groups we cannot add users in the trusted forests to the Exch security groups that assign proper rights to each GAL. Can this configuration work? If so, how are the groups configured to allow the access necessary to display the proper GAL? Thank you

Hi, Can you create a group in students forest and grant the group has permission to access the separated global address list which you created for the students domain? Another thread for your reference in case you encounter similar problem: Gal Segregation question http://social.technet.microsoft.com/Forums/en-CA/exchangesvradmin/thread/42bb8c3c-9c97-4268-9631-37091eefe46b Mike Shen TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com