<A href="http://lekkimworld.com/2012/02/08/soap_headers_in_lotus_domino_web_service_consumers_and_providers.html" target="_blank">Mikkel Heisterberg was having some problems with a project using the consumer and provider services</A> in Domino. He discovered a MessageContext class that solved the problem. He's posted some code and a link to the original post.