SOAP Endpoint Invocation Fails with OSB-380001: mustUnderstand Error

If SOAP endpoint invocation fails in an integration with the following OSB-380001 - mustUnderstand fault, there are several possible solutions.

<fault xmlns="http://www.bea.com/wli/sb/context">
<errorCode>OSB-380001</errorCode><
<reason>Fault received on invocation of target : https://host:port/endpoint
<![CDATA[ Fault Code : codeNS:MustUnderstand Fault String : Unprocessed 
'mustUnderstand' header element:
{http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd}
Security ]]> </reason>
<location>node>RouteNode1</node><path>response-pipeline</path>
</location> 
</fault>

Solutions:

If the SOAP Adapter connection was created with a static WSDL file or dynamic WSDL URL (valid URL), but the connection fails at runtime with the following error/fault message pointing to an unexpected host/port or endpoint URL, ensure that the WSDL has the correct service endpoint URL.
```
<service name="PrecisionService">
   <port binding="tns:PrecisionServiceBinding" name="PrecisionPort">
    <soap:address 
location="http://correct_host:correct_port/correct_soap_endpoint>"/>
   </port>
</service>
```
If the WSDL has incorrect endpoint information as seen in the fault message, fix the WSDL service port to resolve the issue.