I have tried to create Ensemble SOAP passthrough operation following this guide.
Here's my production configuration (after steps 1-4):
Class Passthrough.Production Extends Ens.Production{XData ProductionDefinition{<Production Name="Passthrough.Production" LogGeneralTraceEvents="false"><Description></Description><ActorPoolSize>2</ActorPoolSize><Item Name="PassthroughOperation" Category="" ClassName="EnsLib.SOAP.GenericOperation" PoolSize="1" Enabled="true" Foreground="false" Comment="" LogTraceEvents="false" Schedule=""><Setting Target="Adapter" Name="HTTPServer"

