I was monitoring one of my windows servers just fine until I installed ISA Server 2006 and not I can't see monitor it.
Does something have to set specifically to monitor an ISA Server?
Sounds like the default on a ISA Server which is a firewall I'm sure it's probably blocking the icmp and snmp pings coming to it from NPM. You most likely need to configure a rule on the ISA Server to permit icmp and snmp from the NPM server to the ISA Server.
Yep.. Had to allow SNMP traffic out.
I'll leave ICMP off due to me being paranoid.
Thanks!