3426499 - Cannot supply multiple client credentials error OAuth 2.0

Symptom

When using an OAuth-based access token request on the NetWeaver AS ABAP to call an external system, the following message is recorded:

"Client authentication failed (e.g., unknown client, no client authentication included, ...) invalid_request...
Cannot supply multiple client credentials. Use one of the following: credentials in the Authorization header, credentials in the post body, or a client_assertion in the post body."

Environment

SAP NetWeaver Application Server ABAP

Product

ABAP platform all versions ; SAP NetWeaver all versions ; SAP S/4HANA all versions

Keywords

oauth, client authentication, client_assertion, oa2c_config, invalid_request, client_id , KBA , BC-SEC-LGN-OA2 , OAuth 2.0 for ABAP , Problem

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