Well even if you do find a way to disable it, all the user has to do is plug in a usb cable and download msn again to the phone and it'll work unless there is a way to block the app itself on the server so even if they get it downloaded and installed it will not communicate. I don't think there is a way to disable it in BES, although I have not used BES myself so I'm really not much help to you. I'll keep looking though, I'm kinda curious as well and I can see how this would become an issue if everyone starts chatting on MSN during work hours... just hope they don't update to 4.5, because then the 8830 will get SlingPlayer and all kinds of new features... lol
Edit: I stand corrected about the usb issue (unless someone has found a way to do it). You have to go on the phone to
http://www.blackberry.com/devicesoftware/e...HaHA**?code=wlm (you'll have your own session ID), to download the software. Can you block certain websites? I would block "http://www.blackberry.com/devicesoftware/*" if you could. That should solve it I think.
I may be way off, but let me know if it works, or what u find out

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QUOTE
External Network Connections
Specify whether or not the application can make external network connections. You can use this rule to permit or prevent the application from sending or receiving any data on the BlackBerry device using an external protocol (for example, using a WAP gateway, public MDS, or TCP), or to require the user to respond to a prompt on the BlackBerry device to permit external connections through the BlackBerry device firewall.
Prompt User
4.0
http://www.blackberry.com/btsc/search.do?c...%200%2093154616