In Exchange 2007 we hid specific mailboxes from the GAL. We then provided specific users the ability to send to and the ability to view those mailboxes from the GAL. We just completed a migration to Exchange 2013 and have found some information on making them visible but am looking for a process to Hide them and again provide permission to specific users to be able to send to them and view them in the GAL.
Also, hiding contacts seems to have gone away and I am now to create Address Book Policies? Is there a good write-up on Address Book Policies?