How To Fix SUSR_CERT054 - Syntax error: Logon attribute &1 must not occur in the subject filter

SAP Error Message - Details

• Message type: E = Error

• Message class: SUSR_CERT - User Certificates Administration

• Message number: 054

• Message text: Syntax error: Logon attribute &1 must not occur in the subject filter

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SUSR_CERT054 - Syntax error: Logon attribute &1 must not occur in the subject filter ?

  The SAP error message SUSR_CERT054 indicates a syntax error related to the logon attribute in the subject filter of a digital certificate. This error typically occurs when there is a misconfiguration in the settings for user authentication, particularly when using X.509 certificates for Single Sign-On (SSO) or other authentication mechanisms.
  Cause:
  The error message suggests that a specific logon attribute (denoted as &1 in the error message) is incorrectly defined in the subject filter of the certificate. This can happen due to:
  
  Incorrect Configuration: The subject filter in the certificate configuration may include attributes that are not allowed or are incorrectly formatted.
  Missing Attributes: Required attributes may be missing from the subject filter.
  Version Mismatch: There may be a mismatch between the expected attributes in the SAP system and those provided by the certificate.
  
  Solution:
  To resolve the SUSR_CERT054 error, you can follow these steps:
  
  
  Check the Subject Filter Configuration:
  
  Go to the transaction code SICF (HTTP Service Hierarchy Maintenance) and check the configuration for the service that is using the certificate.
  Review the subject filter settings in the relevant profile or configuration for the user authentication.
  
  
  
  Validate Logon Attributes:
  
  Ensure that the logon attributes specified in the subject filter are valid and correctly formatted. Common attributes include CN (Common Name), O (Organization), OU (Organizational Unit), etc.
  Make sure that the attribute &1 (as indicated in the error message) is not included in the subject filter if it is not supposed to be there.
  
  
  
  Update the Certificate:
  
  If the certificate is outdated or incorrectly issued, consider obtaining a new certificate that correctly matches the expected attributes.
  Ensure that the certificate is issued by a trusted Certificate Authority (CA) and that it contains the necessary attributes.
  
  
  
  Test the Configuration:
  
  After making changes, test the logon process to ensure that the error is resolved.
  Use transaction SU01 to check user settings and ensure that the user can log in without issues.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to X.509 certificate configuration and user authentication for additional guidance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Security Configuration: Review the overall security configuration in your SAP system, especially if you are using SSO or other advanced authentication methods.
  
  By following these steps, you should be able to identify and resolve the cause of the SUSR_CERT054 error in your SAP system.