I try set permission RO for external mailbox. I try do this with this solution
http://exchangeshare.wordpress.com/2009/07/07/how-to-setup-read-only-mailbox-in-exchange-20032007
And doesn't work. I try with PowerShell command (Add-MailboxPermission) but when I do this and then open Outlook I have full access to this external mailbox.
Anybody have some idea what I may do this?
Regards Mick