I'm thinking about turning on the messenger service for all the computers on in the domain, any thoughts on this?

I remember way back when people had problems with spam coming through it, but I'm thinking that since we're all behind a firewall it wouldn't come through from the outside. Is this right?

Also I have three different locations all on the same domain, each with it's own DC, and connected through ipsec tunnels. Do you think a general messege sent like - net send * "Yes I know the exchange server is down so stop calling me, I'll have it back up in a couple of minutes" would be broadcast to all computers at all locations or just the computers connected to my location?


Thanks.