I see in the release notes for 4.5.1 that aliases can now be hidden from the GAL, which is fantastic (we have a number of aliases set up for each user to allow them to recieve mail that may have been sent to them using a common misspelling of their name, clearly that looks messy when those misspellings are offered as a suggestion when typing their address in the to: field)

So, with glee, I log in to the admin console to turn off GAL entries for all/most of the the aliases, but the option is not where I'd expect it to be. Can anyone clarify how to do this?