2798977 - SOAP 401 unauthorized error

You are trying to send SOAP messages from an external system to SAP Process Orchestration using client certificate authentication. During this, you are getting a 401 unauthorized error.

An example of this error could be the following:
ERROR: The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Basic realm="XISOAPApps"'

In the ICM traces, you can find examples of the below error:

HTTP response (raw):
    HTTP/1.1 401 Unauthorized
    server: SAP NetWeaver Application Server 7.49 / AS Java 7.50
    date: <Time of error>
    www-authenticate: Basic realm="XISOAPApps"

• SAP NetWeaver
• SAP Process Integration

Process Integration, PI, Process Orchestration, PO, NetWeaver, XI, AEX, Trusted CA, Third Party, XI, Exchange Infrastructure, Adapter, Communication Channel, , KBA , BC-XI-CON-SOP , SOAP Adapter , Problem