How To Fix CLB656 - No SAML2 session ID provided in response

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB - SAIL: Common messages

• Message number: 656

• Message text: No SAML2 session ID provided in response

What causes this issue?

A call has been made to the service provider in order to get a session
ID for the current user from a SAML assertion.

System Response

The method in progress will be cancelled.

How to fix this error?

Most likely the reason is that the user is not known at the service
provider site. Just add the user to the service provider.
Another reason might be that the current user is at the same time site
administrator or similar at the service provider site and this not
allowed to execute business functions.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB656 - No SAML2 session ID provided in response ?

  The SAP error message CLB656: No SAML2 session ID provided in response typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language) in SAP systems. This error indicates that the SAML response received from the Identity Provider (IdP) does not contain a session ID, which is necessary for establishing a user session in the SAP system.
  Causes:
  
  Misconfiguration of the Identity Provider (IdP): The IdP may not be configured to send the session ID in the SAML response.
  Incorrect SAML Assertion: The SAML assertion may be malformed or missing required attributes.
  Network Issues: There may be network issues preventing the proper transmission of the SAML response.
  Version Mismatch: There could be a mismatch between the SAML versions supported by the SAP system and the IdP.
  Expired or Invalid Session: The session may have expired or been invalidated, leading to the absence of a session ID.
  
  Solutions:
  
  
  Check IdP Configuration:
  
  Ensure that the IdP is correctly configured to include the session ID in the SAML response. This may involve checking the SAML settings in the IdP management console.
  Verify that the correct attributes are being sent in the SAML assertion.
  
  
  
  Review SAML Assertion:
  
  Use tools like SAML Tracer (a browser extension) to capture and analyze the SAML response. Check if the session ID is present in the response.
  Ensure that the SAML assertion is valid and contains all necessary attributes.
  
  
  
  Network Troubleshooting:
  
  Check for any network issues that might be affecting the communication between the SAP system and the IdP.
  Ensure that firewalls or proxies are not blocking the SAML response.
  
  
  
  Version Compatibility:
  
  Verify that both the SAP system and the IdP support the same SAML version (e.g., SAML 2.0).
  Update configurations if there are discrepancies in supported versions.
  
  
  
  Session Management:
  
  Check the session management settings in both the SAP system and the IdP. Ensure that sessions are being created and maintained correctly.
  If the session has expired, try re-authenticating to generate a new session.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to SAP's official documentation on SAML and SSO configurations for detailed guidance on setting up and troubleshooting SAML-based SSO.
  IdP Documentation: Consult the documentation for your specific IdP (e.g., ADFS, Okta, etc.) for configuration details related to SAML assertions and session management.
  Logs and Traces: Check the SAP system logs (transaction SM21) and the IdP logs for any additional error messages or warnings that could provide more context on the issue.
  
  By following these steps, you should be able to identify and resolve the issue related to the CLB656 error message in your SAP environment.