Check the definitions
(http://www.tivoli.com/products/licensing/enhanced-vbp-definitions.doc).

"For IBM Tivoli products, processors installed in servers require
licensing."

"A server is a computer system that provides services to one or more clients
and/or other devices over a network.  Examples include, but are not limited
to, file servers, print servers, mail servers, database servers, application
servers, and Web servers."

So the NT clients would not require Processor licenses (unless they are
acting as a "Server"!) - but would require a Client license ("A client is a
computer system or process that requests a service of another computer
system that is typically referred to as a server.")