How To Fix SOAUTH2040 - Different redirection URIs sent to authorization and token endpoint.

SAP Error Message - Details

• Message type: E = Error

• Message class: SOAUTH2 - OAuth2 Messages

• Message number: 040

• Message text: Different redirection URIs sent to authorization and token endpoint.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SOAUTH2040 - Different redirection URIs sent to authorization and token endpoint. ?

  The SAP error message SOAUTH2040 indicates that there is a mismatch between the redirection URIs used in the authorization request and the token request in the OAuth 2.0 flow. This error typically occurs when the application is trying to authenticate using OAuth 2.0, and the redirection URI specified in the authorization request does not match the one specified in the token request.
  Cause:
  
  Mismatched URIs: The redirection URI provided in the authorization request does not match the one registered in the OAuth client configuration or the one used in the token request.
  Configuration Issues: The OAuth client may not be properly configured in the SAP system, leading to discrepancies in the expected and actual redirection URIs.
  Typographical Errors: There may be typographical errors in the redirection URIs, such as missing slashes, incorrect domains, or case sensitivity issues.
  Environment Differences: If you are working in different environments (e.g., development, testing, production), the registered redirection URIs may differ across these environments.
  
  Solution:
  
  Check Configuration: Verify the OAuth client configuration in the SAP system. Ensure that the redirection URI registered for the client matches exactly with the one being used in both the authorization and token requests.
  Consistent URIs: Ensure that the same redirection URI is used in both the authorization request and the token request. This includes checking for any trailing slashes or case sensitivity.
  Update Application Code: If the application code is generating the redirection URIs dynamically, ensure that it is consistent and correctly configured to use the same URI for both requests.
  Test with Known Values: If possible, test the OAuth flow with known, hardcoded values for the redirection URI to rule out issues with dynamic generation.
  Review Documentation: Consult the SAP documentation for OAuth configuration to ensure that all settings are correctly applied.
  
  Related Information:
  
  OAuth 2.0 Specification: Understanding the OAuth 2.0 flow and the role of redirection URIs can help in troubleshooting issues related to authorization and token requests.
  SAP Notes and Documentation: Check for any relevant SAP Notes or documentation that may provide additional insights or updates regarding OAuth configuration and common issues.
  Logs and Traces: Review logs and traces in the SAP system to gather more context about the error and identify where the mismatch is occurring.
  
  By following these steps, you should be able to resolve the SOAUTH2040 error and ensure that your OAuth 2.0 implementation works correctly.