I have this request frequently. I am one several admins that's responsible for over 11,000 outlook objects, both active and hidden. The problem that I have with this is the data inconsistency that occurs when users edit their own properties on the GAL. As if to say... how many different ways can you spell Phonex (aka Phoenix)? As far as I know input masks are not available for fields. I would be interested in other readers comments/suggestions.