How To Fix SAML2128 - Name ID value is not supplied

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 128

• Message text: Name ID value is not supplied

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2128 - Name ID value is not supplied ?

  The SAP error message SAML2128: Name ID value is not supplied typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language). This error indicates that the SAML assertion being processed does not contain a Name ID value, which is essential for identifying the user in the SSO process.
  Cause:
  
  Missing Name ID in SAML Assertion: The SAML assertion sent from the Identity Provider (IdP) to the Service Provider (SP) does not include the Name ID element, which is required for user identification.
  Configuration Issues: There may be misconfigurations in the SAML settings either on the IdP or SP side, leading to the omission of the Name ID.
  User Attributes Mapping: The mapping of user attributes between the IdP and SP may not be correctly set up, resulting in the Name ID not being populated.
  
  Solution:
  
  
  Check IdP Configuration:
  
  Ensure that the IdP is configured to send the Name ID in the SAML assertion. This typically involves checking the attribute mappings and ensuring that the Name ID is included in the SAML response.
  Verify that the Name ID format is compatible with what the SP expects (e.g., email, persistent, transient).
  
  
  
  Review SAML Assertion:
  
  Use tools like SAML Tracer or browser developer tools to inspect the SAML assertion being sent from the IdP to the SP. Look for the Name ID element in the assertion.
  If the Name ID is missing, you may need to adjust the IdP settings to include it.
  
  
  
  SP Configuration:
  
  Ensure that the SP is correctly configured to accept the Name ID format being sent by the IdP.
  Check the SAML settings in the SAP system to ensure that they align with the IdP's configuration.
  
  
  
  User Attribute Mapping:
  
  If the Name ID is derived from user attributes, ensure that the correct attributes are being sent from the IdP and that they are mapped correctly in the SP configuration.
  
  
  
  Testing:
  
  After making changes, perform tests to ensure that the SSO process works correctly and that the Name ID is being received as expected.
  
  
  
  Related Information:
  
  SAML Specifications: Familiarize yourself with the SAML specifications, particularly regarding Name ID and assertions.
  SAP Documentation: Refer to SAP's official documentation for SSO and SAML configurations for specific guidance related to your SAP version.
  Logs and Traces: Check the logs on both the IdP and SP sides for any additional error messages or warnings that could provide more context about the issue.
  
  By following these steps, you should be able to resolve the SAML2128 error and ensure that the Name ID is correctly supplied in the SAML assertion.