We have an MPLS network with all of our sites connected through VPN tunnells. Somehow, our users have figured out that they can open Outlook and get to their email. We don't want this to happen.
Is there a way to block Outlook 2007 from connecting through the firewall? Maybe a port number or something?
I don't want to block it in Group Policy, because I want them to be able to open Outlook if they need to. Sometimes we send them disks that have PST files and they need to read them. So blocking Outlook all together is not an option.
Also, keep in mind that I need to be able to centrally manage this change. I don't want to go into each person's host file and change that.