Anyone knows how to block MSN Messenger on ISA Server 2004? (Or in the Default Domain Policy for that matter?). You can block the built-in Messenger (4.7 I think) but not newer version, which apparently find their way through HTTP. The only way I managed to do it is a combination of blocked destinations: 207.46.104.20 207.46.110.1 ? 207.46.110.254 64.4.0.0 ? 64.4.63.255 gateway.moswest.msn.net messenger.hotmail.com I?m not sure which one does it but it works. However, the 2 other problems I have now: 1. I can?t access Hotmail?s page either. 2. Most of the times I cannot access Windows Updates. If anyone has a better solution I?d greatly appreciate sharing it with me. Thanks, Steven