Short description of GALHider 1.0: GALHider allows network administrators to easily hide and show users in the Outlook Exchange Global Address List (GAL). GALHider works by searching for a list of users or contacts in Active Directory, based on a search term or member group that you provide. It then sets the msExchHideFromAddressLists flag to hide the list of users from the Exchange Global Address List. This is effective for all users who run Outlook on your network.