CAS NLB -how can you monitor clients going to which CAS

[blade1000]

Hello-

Is there a freeware tool that can monitor which CAS server a mapi client (outlook 2007) actually goes to ? my CAS server is using MS NLB.. is there a resource kit tool perhaps that will allow me to see which clients go to which CAS in a 2 node NLB?

CAS/HUB are on same server x 2 in the NLB (not sure if this matters in determining a potential answer here).

my nlb setup seems to be configured correctly after attempting a proper setup many times over... I don't have the UC San cert installed yet also but I can test internally via

https://servername/owa..

I just would like more control of client to CAS connectivity is "seeing" who goes to which. we are not ready to purchase a hardware loadbalancer due to insufficient $$$'s.

thanks

blade