We have a Windows environment with a SBS 2011 server with Exchange 2007.
There is one Outlook 2007 user in particular who for some reason, her email folders can be seen by other Exchange users if they Open it (File -> Open -> Other User's Folder.) When I tested this with other users, it was possible to view everyone's folders.
I looked in the Exchange Management Tool but I didn't see any signs of these folders being shared. I looked in her Outlook Security settings and I noticed that "Authenticated Users" are allowed to "Read Exchange Information", among other permissions.
My question is... Are there other security settings (client side or server side) that can prevent users from viewing each others' email folders?