Ahhhh.. Here lies the beauty of exchnage..... As long as you are one of the exch admins.... Simply do the following.
In YOUR outlook, go to tools/services/exchange/advanced/add mailbox
this will allow you to open and view their mailbox, any time you want.
An exec wants to see what his staff is doing, No problem.
Simply open up your exch admin program, navigate to the users mailbox. Open it up and choose permissions, add the execs name as a mailbox owner. Voila', using the same method you did to open a mailbox, so can he.
Want to allow someone to "send as" a distro list, in the permissions area of the distro list (or mailbox....hmmmm) add the users name and give them send as permissions.
Then when they generate an e-mail, all they need to do is make the from field appear, click on the from button and select that persons name from the GAB.
Enjoy LordInfidel's tips and tricks.