We have an external Sales force and other groups of users that I would like to apply this too. They all have our company exchange / ad accounts. email@example.com
A long time ago I created a dynamic distribution list so only certain users can email distribution list and this works fine. However, If a regular employee selects the whole company address book (we only have one address book) is there a way to prevent that employee from being able to email the sales / other users directly?
Whats the best way to approach this?
Exchange 2013, most all users use Outlook 2010 or 2013.