I have a pretty strong feeling that you may need to implement SOAP extensions. Using SOAP extensions you can intercept the outgoing / incoming SOAP messages at different stages in the processing pipeline in order to perform additional functionality with them. Information can be found here: http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapextension.aspx\[^\]

If you need to intercept a SOAP message, have you tried writing a SOAP extension - more info can be found here:- http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapextension.aspx[^] I am not precisely sure but i presume you could then intercept the SOAP message before it is sent over the wire and pass the call to your remoting service instead?