How To Fix SAML2027 - Entity &1 is not defined in the element 'AudienceRestriction'

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 027

• Message text: Entity &1 is not defined in the element 'AudienceRestriction'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2027 - Entity &1 is not defined in the element 'AudienceRestriction' ?

  The SAP error message SAML2027 indicates that there is an issue with the SAML (Security Assertion Markup Language) configuration, specifically related to the AudienceRestriction element in the SAML assertion. This error typically occurs when the audience specified in the SAML assertion does not match the expected audience defined in the SAP system.
  Cause:
  The error is caused by one of the following reasons:
  
  Mismatch in Audience URI: The audience URI specified in the SAML assertion does not match the expected audience URI configured in the SAP system.
  Configuration Issues: The SAML service provider (SP) or identity provider (IdP) may not be correctly configured, leading to an incorrect audience being sent in the SAML assertion.
  Missing Configuration: The entity (service provider) is not defined in the SAML configuration, leading to the system not recognizing it.
  
  Solution:
  To resolve the SAML2027 error, you can follow these steps:
  
  
  Check SAML Configuration:
  
  Verify the SAML configuration in the SAP system. Ensure that the audience URI defined in the SAML assertion matches the expected audience URI configured in the SAP system.
  You can check the configuration in transaction SAML2 in the SAP system.
  
  
  
  Update Audience URI:
  
  If the audience URI in the SAML assertion is incorrect, update the configuration in the identity provider (IdP) to send the correct audience URI that matches the SAP system's configuration.
  
  
  
  Define the Entity:
  
  If the entity is not defined in the SAP system, you need to add it. In transaction SAML2, ensure that the service provider is correctly defined and that the audience restriction is set up properly.
  
  
  
  Test the Configuration:
  
  After making the necessary changes, test the SAML authentication flow to ensure that the error is resolved.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for SAML configuration for detailed steps and best practices.
  
  
  
  Related Information:
  
  SAML Assertions: Understand the structure of SAML assertions, particularly the AudienceRestriction element, which specifies the intended audience for the assertion.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or provide updates related to SAML configuration.
  Logs and Traces: Review the logs and traces in the SAP system to gather more information about the error and the context in which it occurred.
  
  By following these steps, you should be able to resolve the SAML2027 error and ensure proper SAML authentication in your SAP environment.