I need to be able to stop Delegates from seeing some folders when they Proxy
across to their bosses mailbox to send emails for them. There is currently a
Confidential folder set up in the mailbox but the delegates/secretaries can
see the contents.

I have been advised that I need to remove the Delegate's full access rights
from Mailbox Rights in Exchange. I then need to set up a secondary mailbox
for the user where these confidential emails will be sent to. I'd then need
to add the secondary mailbox to the bottom of their Outlook Mailbox or get
them to use Open Other User's Folder.

Surely there must be a better way. Any help would be greatly appreciated.