While trying to call a WCF service from within the C/Al in Microsoft Dynamics NAV, we were getting the below error
“No Action header was found with namespace ‘http://www.w3.org/2005/08/addressing‘ for the given message.”
Strangely enough that request was working properly from within the SOAP UI.
Eventually the following thread came to the rescue
The service was expecting a Soap Header xml containing the Action along with SOAPAction header as shown below within the Soap Envelope.
Hope it helps..