Plugin to monitor world wide web publishing service in excha

Nagios Nagios Plugins support
1

Hi,
I want to check the world wide web publishing service running in the exchange 2003 server.

I am using check_nt pluginas follows.

check_nt -H $HOSTADDRESS$ -p 12489 -v SERVICESTATE -l $ARG1$ .

can any one tell what string i have to use in the place of SERVICESTATE to check world wide web service or another plugin to monitor this service.

Thanks in advance,
Indhu