Blocking IM Clients (AOL, MSN) on Win XP Pro

From: Rafael (rafael1119_at_hotmail.com)
Date: 04/30/04 

Date: Fri, 30 Apr 2004 09:14:42 -0400

Please help!

I need to block IM communications for some of my users at the desktop as
they do not login to the DC. Is there a local GPO that I can modify so that
they won't be able to use either AOL Messenger or MSN Messenger?

Thanks,

Rafael