Exchange Server 2010 SP2: I need to remove the email addresses from displaying when typing in a receipients name

I have searched on the web for an answer to my problem and have come up short. I need to remove the email addresses from displaying when you are typing a recipients name in a new email. We are using Outlook 2010 and Exchange Server 2010 SP2. My ideal fix would be in the Exchange server so that it would fix everyone.

The only thing that I could find was to turn off the Auto-complete but I have 700+ users and do not want to do that manually and also have to clear all of their Auto-complete histories as well.

Any ideas??

Thanks!