How To Fix SAML2076 - Authentication failed: No appropriate entry in USREXTID

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 076

• Message text: Authentication failed: No appropriate entry in USREXTID

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2076 - Authentication failed: No appropriate entry in USREXTID ?

  The SAP error message SAML2076: Authentication failed: No appropriate entry in USREXTID typically occurs during the Single Sign-On (SSO) process when the system is unable to find a corresponding entry in the user external ID table (USREXTID) for the user attempting to authenticate. This can happen in scenarios where SAML (Security Assertion Markup Language) is used for authentication.
  Cause:
  
  Missing User Mapping: The user trying to log in does not have a corresponding entry in the USREXTID table. This table is used to map external identities (like those from an Identity Provider) to SAP user IDs.
  Incorrect Configuration: The SAML configuration might not be set up correctly, leading to mismatches between the external identity and the SAP user.
  User Not Created: The user may not exist in the SAP system at all, or the user ID may be incorrect.
  Identity Provider Issues: The Identity Provider (IdP) may not be sending the correct attributes or claims that are expected by the SAP system.
  
  Solution:
  
  
  Check User Mapping:
  
  Go to transaction SU01 and check if the user exists in the SAP system.
  Use transaction USREXTID to verify if there is an entry for the user in the USREXTID table. If not, you will need to create one.
  
  
  
  Create or Update User Entry:
  
  If the user does not exist in the USREXTID table, create a new entry that maps the external identity (e.g., email, username) to the SAP user ID.
  Ensure that the external ID matches what is being sent from the IdP.
  
  
  
  Review SAML Configuration:
  
  Check the SAML configuration in the SAP system (transaction SAML2) to ensure that the attributes being sent from the IdP match the expected attributes in SAP.
  Ensure that the correct user ID attribute is being used for mapping.
  
  
  
  Check IdP Configuration:
  
  Verify the configuration of the Identity Provider to ensure that it is sending the correct attributes and that the user exists in the IdP.
  
  
  
  Testing:
  
  After making changes, test the SSO login again to see if the issue is resolved.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SU01: User Maintenance
  USREXTID: User External ID Maintenance
  SAML2: SAML Configuration
  
  
  Documentation: Refer to SAP Help documentation for SAML and SSO configurations for detailed steps and best practices.
  Logs: Check the SAML trace logs for more detailed error messages that can provide additional context on the failure.
  
  By following these steps, you should be able to resolve the SAML2076 error and successfully authenticate users via SSO in your SAP environment.