How To Fix CLB2656 - No SAML2 session ID provided in response

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB2 - 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 to get a session ID for the
current user from a SAML assertion.

System Response

The method in progress is canceled.

How to fix this error?

Add the user to the service provider - it is likely that the user is not
known at the service provider site.
Alternatively, the current user might not be permitted to execute
business functions, for example, if he or she is a site administrator or
has a similar role at the service provider site.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB2656 - No SAML2 session ID provided in response ?

  The SAP error message CLB2656: No SAML2 session ID provided in response typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language) 2.0. This error indicates that the expected SAML2 session ID is missing from the response received from the Identity Provider (IdP) during the authentication process.
  Causes:
  
  Misconfiguration of the Identity Provider (IdP): The IdP may not be correctly configured to send the SAML2 session ID in the response.
  Incorrect SAML Assertion: The SAML assertion returned by the IdP may not include the necessary session ID.
  Network Issues: There may be network issues preventing the proper transmission of the SAML response.
  Expired or Invalid Session: The session may have expired or been invalidated, leading to the absence of a session ID.
  SAP System Configuration: The SAP system may not be properly configured to handle SAML responses.
  
  Solutions:
  
  
  Check IdP Configuration:
  
  Ensure that the IdP is configured to include the SAML2 session ID in the response. This may involve checking the settings related to SAML assertions and session management.
  
  
  
  Review SAML Assertion:
  
  Use tools like SAML Tracer (a browser extension) to capture and analyze the SAML response. Verify that the session ID is included in the assertion.
  
  
  
  SAP System Configuration:
  
  Review the SAML configuration in the SAP system. Ensure that the SAML2 service provider settings are correctly set up to expect and process the session ID.
  
  
  
  Check for Expired Sessions:
  
  If the session has expired, try re-authenticating to generate a new session ID.
  
  
  
  Consult Logs:
  
  Check the logs on both the SAP system and the IdP for any errors or warnings that might provide more context about the issue.
  
  
  
  Update Software:
  
  Ensure that both the SAP system and the IdP are running the latest versions and patches, as updates may resolve known issues.
  
  
  
  Related Information:
  
  SAML2 Configuration in SAP: Familiarize yourself with the SAML2 configuration settings in the SAP system, which can be found in the SAP Help documentation.
  Identity Provider Documentation: Review the documentation for the IdP being used to ensure that it is set up correctly for SAML2 authentication.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on SAML2 configuration.
  
  If the issue persists after following these steps, consider reaching out to SAP support or your IdP's support team for further assistance.