A client has MS Small Business Server installed and numerous iMacs and MacBooks in their office which staff use. They use Google Apps for Business for email not Exchange.
Their IT guy needed to set up some 'pseudo' accounts for some reason - firstname.lastname@example.org. These aren't valid email addresses - just accounts that he needed to set up for some function required in SBS, but are - misleadingly - very similar to the real Google Apps email addresses: email@example.com (i.e. minus the 'remote')
The issue they're having is that these invalid addresses are appearing in the staff Mac address book under "Directory Services". And frequently these invalid addresses are selected when composing emails and thus get delivery failure notifications.
My question is how can I prevent these invalid addresses from being picked up by OSX Address Book / Mail? I appears that I need to disable the relevant Directory Services settings using /System/Library/CoreServices/Directory Utility.app but I can't see anything relevant there.