I need to grant full mailbox access to a group through Active Directory so that they can view, forward and send mail from each other's mailboxes. I need to do this through AD rather than by having each user share his/her calendar through Outlook.
In AD, I already went to Exchange Advanced-->Mailbox Rights and added the group to each user's mailbox rights. I checked the Full Mailbox Access box, but the users can only view each other's mailboxes. They can't forward or send new mail.