How To Fix SAML2026 - '&1' elements reference different users

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 026

• Message text: '&1' elements reference different users

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2026 - '&1' elements reference different users ?

  The SAP error message SAML2026 indicates that there is a mismatch in the user references in a SAML (Security Assertion Markup Language) assertion. Specifically, it means that the elements in the SAML assertion are referencing different users, which is not allowed. This error typically occurs in scenarios involving Single Sign-On (SSO) where SAML assertions are used to authenticate users.
  Cause:
  The error can be caused by several factors, including:
  
  
  Multiple User Identifiers: The SAML assertion may contain multiple identifiers (e.g., NameID, attributes) that refer to different users. This can happen if the identity provider (IdP) is misconfigured or if there are issues with the user mapping.
  
  
  Incorrect Configuration: The configuration of the SAML settings in SAP or the IdP may not be aligned, leading to inconsistencies in user identification.
  
  
  User Attribute Mismatch: The attributes being sent in the SAML assertion may not match the expected attributes in the SAP system, causing the system to interpret them as references to different users.
  
  
  Session Issues: If there are session-related issues or if the user has multiple active sessions, it may lead to confusion in user identification.
  
  
  Solution:
  To resolve the SAML2026 error, you can take the following steps:
  
  
  Check SAML Assertion: Review the SAML assertion being sent from the IdP. Ensure that all user identifiers (e.g., NameID, email, etc.) refer to the same user.
  
  
  Verify IdP Configuration: Ensure that the IdP is correctly configured to send consistent user identifiers. Check the mappings of user attributes and ensure they align with what SAP expects.
  
  
  SAP Configuration: Review the SAML configuration in SAP. Ensure that the expected user attributes and identifiers are correctly set up in the SAP system.
  
  
  User Mapping: If you are using a user mapping table or configuration, ensure that it correctly maps the IdP users to the corresponding SAP users.
  
  
  Test with Different Users: If possible, test the SSO process with different users to see if the issue is isolated to specific accounts or if it is a broader configuration issue.
  
  
  Logs and Traces: Check the logs on both the SAP side and the IdP side for any additional error messages or warnings that could provide more context about the issue.
  
  
  Consult Documentation: Refer to the SAP documentation for SAML configuration and troubleshooting. This can provide insights into common pitfalls and best practices.
  
  
  Contact Support: If the issue persists after checking the above points, consider reaching out to SAP support or your IdP support for further assistance.
  
  
  Related Information:
  
  SAML Assertions: Understanding how SAML assertions work and the structure of the assertions can help in troubleshooting.
  User Management in SAP: Familiarity with how user management and authentication work in SAP can provide insights into potential issues.
  SSO Configuration: Knowledge of SSO configuration in both SAP and the IdP is crucial for resolving SAML-related issues.
  
  By following these steps, you should be able to identify and resolve the cause of the SAML2026 error in your SAP environment.