I am using Exchange 2000, and Outlook 2000, XP, and 2003 on my desktops. When I open outlook and go to FileOpenOther User's Folders I can type the name of any other exchange user in and open their mailbox and read their emails. I have looked at the permissions for the Inbox on several user folders. The only thing liisted is Default - None and Anonomous - None. There are no other explicit permissions. How can I block one user from accessing other mailboxes?