Hi there, would it not be easy just to set permissions for these peoples mailbox so that you can have them delivered into another mail box as well and have that set up on outlook to deliver into personal folders, that way you would be able to check away at your leisure. That way, as long as outlook is open, anyemails will filter in within a minute or two of delivery into the exchange.
I have out look set up on a pc down here that sees all mailboxes, only because our computers go down from time to time, and so people can see urgent emails if necessary. I have to admit I do not know how this stands legally, as it was set up by the boss before I came here.
Hope this helps