2318485 - SAML 2.0: "SAML20 CX_SAML20_CORE: Access by the SOAP request to COMMUNICATION_ERROR was denied with status 1"

When performing a SAML 2.0 authentication it fails and you are redirected to a logon screen.

In SAML 2.0 traces system raises the following exception:

• SAML20 CX_SAML20_CORE: Access by the SOAP request to COMMUNICATION_ERROR was denied with status 1
  
  
  
  

  To collect the SAML 2.0 traces access the Security Diagnostic Tool in the AS ABAP system by calling the URL below: http(s)://<host>:<port>/sap/bc/webdynpro/sap/sec_diag_tool?sap-client=<XXX> Press the start button, reproduce the scenario and press the stop button. More information regarding the Security Diagnostic Tool for ABAP can be found here.

• SAP NetWeaver AS ABAP 7.02
• SAP NetWeaver AS ABAP 7.30
• SAP NetWeaver AS ABAP 7.31
• SAP NetWeaver AS ABAP 7.40 and higher

SAML 2.0, SAML2, SAML, ADFS, authentication, single sing-on, sso, fiori, lauchpad, strust, certificate, ssl , KBA , saml , authentication , single sign-on , adfs , saml2 , saml 2.0 , BC-SEC-LGN-SML , SAML 2.0 for ABAP , Problem