It is advised that devices who want to become interoperable with NAP
implement the Statement of Health (SOH) for NAP. The protocol is documented
here: http://msdn2.microsoft.com/en-us/library/cc246924.aspx
Microsoft NAP provides a means for third parties to define, measure and
cause action based on the health of the device. Third party services that
implement the SOH need to define what it means for a device to be healthy,
based on what they feel is important to secure and what is possible to
measure.
Administrators have the ability to allow non-SOH capable devices to
participate in a NAP controlled environment by placing such devices on
exception lists. Exceptions may introduce increased security risks to a
given network.
I can go into (slightly) more detail on Thursday.
Thanks,
Erhan