I was wondering if someone would be able to tell me how to hide the child domain GAL from exchange users in the parent domain. For example, parent domain is called domain1.local and child domain is called child.domain1.local. Now, if the child domain exchange users use a @domain1.local suffix is it possible to hide the GAL from the parent domain? if not is it possible to change the suffix to @child.domain1.local? so the email address would be firstname.lastname@example.org.
any advice or ideas on how to do this would be very welcome.