2548392 - 401 Unauthorized response when connecting BTP with backend system using Basic Authentication

• There is a connection between SAP BTP (Cloud Integration) and an SAP NetWeaver AS ABAP system through SAP Cloud Connector (SCC) via HTTP/HTTPS.
• The authentication in the back-end system is performed using Basic Authentication (user & password).
• A request sent to the backend returns with HTTP Status 401.
• In case of CPI, the log shows the following error:

org.apache.cxf.interceptor.Fault: Could not send Message., cause: org.apache.cxf.transport.http.HTTPException: HTTP response '401: Unauthorized' when communicating with [backend URL]

• SAP BTP
• SAP Cloud Connector
• SAP NetWeaver
• SAP NetWeaver Application Server for SAP S/4HANA
• ABAP PLATFORM - Application Server ABAP

Hana Cloud Integration, hci, cpi, wrong credentials, logon procedure, client certificate, authentication, SSC, ICM, ICF, SICF, SAML, 2.0, icm/HTTPS/verify_client, STRUST, SSL Server standard view, RZ11, RZ10, TLS trace, certificate request, no suitable certificate found, outbound, receiver, basic , KBA , scp , sap cloud platform , BC-MID-ICF , Internet Communication Framework , BC-CST-IC , Internet Communication Manager , BC-SEC-LGN , Authentication , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , LOD-HCI-PI-RT , Integration Runtime , BC-NEO-CON , Neo to On-premise Connectivity service , Problem