How To Fix SAML2142 - Only persistent name ID format is supported on register endpoint

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 142

• Message text: Only persistent name ID format is supported on register endpoint

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2142 - Only persistent name ID format is supported on register endpoint ?

  The SAP error message SAML2142: Only persistent name ID format is supported on register endpoint 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 sent to the register endpoint is using a NameID format that is not supported by the endpoint.
  Cause:
  The error is caused by the use of a NameID format that is not "persistent." In SAML, the NameID is a unique identifier for a user, and there are different formats available, such as:
  
  Transient: A temporary identifier that is valid for a single session.
  Email: An email address as the identifier.
  Persistent: A long-lived identifier that remains the same across sessions.
  
  The register endpoint in your SAP system is configured to accept only the "persistent" NameID format. If the SAML assertion being sent uses a different format (like transient or email), the system will reject it and throw the SAML2142 error.
  Solution:
  To resolve this error, you need to ensure that the SAML assertion being sent to the register endpoint uses the "persistent" NameID format. Here are the steps you can take:
  
  
  Check Identity Provider (IdP) Configuration:
  
  Review the configuration of your Identity Provider (IdP) to ensure that it is set to issue SAML assertions with a persistent NameID format.
  If necessary, modify the IdP settings to specify that the NameID format should be persistent.
  
  
  
  Update Service Provider (SP) Configuration:
  
  Ensure that your Service Provider (SP) configuration is set to accept the persistent NameID format.
  If you have control over the SP settings, make sure that it is configured to request a persistent NameID from the IdP.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test to ensure that the SAML assertion is now being sent with the correct NameID format.
  Monitor the logs for any further errors or issues.
  
  
  
  Consult Documentation:
  
  Refer to the documentation for both your IdP and SP for specific instructions on configuring NameID formats.
  
  
  
  Contact Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support or your IdP support for further assistance.
  
  
  
  Related Information:
  
  SAML NameID Formats: Familiarize yourself with the different SAML NameID formats and their use cases.
  SAML Assertions: Understand how SAML assertions work and how they are structured.
  SAP SSO Configuration: Review SAP documentation on configuring SSO and SAML settings for your specific version of SAP.
  
  By ensuring that the correct NameID format is used, you should be able to resolve the SAML2142 error and successfully authenticate users through the register endpoint.