I have an Exchange server 2010 and users running Outlook 2007. And I have 2 different OU, one for administrative users and external users. All users in the administrative OU should be able to see each others calendar, while all external users need to get permission to view calendars. How can I setup this on the Exchange server?
I've been using ExFolders to give permission to everyone, could I just set this permission to be on the administrative OU?