How To Fix 00775 - No suitable SAP user found for X.509-client certificate

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 775

• Message text: No suitable SAP user found for X.509-client certificate

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00775 - No suitable SAP user found for X.509-client certificate ?

  The SAP error message "00775 No suitable SAP user found for X.509-client certificate" typically occurs in scenarios where an X.509 client certificate is used for authentication, but the system cannot find a corresponding SAP user account that matches the certificate's subject or attributes.
  Cause:
  
  
  Missing User Mapping: The most common cause is that there is no SAP user account that corresponds to the X.509 certificate being presented. The system expects a user mapping based on the certificate's subject DN (Distinguished Name) or other attributes.
  
  
  Incorrect Certificate Configuration: The X.509 certificate may not be correctly configured or may not contain the necessary attributes that match an existing SAP user.
  
  
  Certificate Not Trusted: The certificate authority (CA) that issued the X.509 certificate may not be trusted by the SAP system, leading to authentication failures.
  
  
  User Status: The user account that should correspond to the certificate may be locked, inactive, or not properly configured.
  
  
  Solution:
  
  
  Create or Update User Mapping:
  
  Ensure that there is a corresponding SAP user for the X.509 certificate. You can create a new user or update an existing user to match the certificate's subject DN.
  Use transaction SU01 to create or modify the user account.
  
  
  
  Check Certificate Attributes:
  
  Verify that the attributes in the X.509 certificate (like CN, OU, etc.) match the SAP user account. The mapping is typically done based on the Common Name (CN) or other distinguished name attributes.
  
  
  
  Trust the Certificate Authority:
  
  Ensure that the CA that issued the X.509 certificate is trusted by the SAP system. You may need to import the CA certificate into the SAP trust store.
  
  
  
  User Status Check:
  
  Check the status of the user account in SAP. Ensure that the user is active and not locked. You can check this in transaction SU01.
  
  
  
  Review SSL Configuration:
  
  Ensure that the SSL configuration in the SAP system is correctly set up to handle X.509 client certificates. This includes checking the SSL server and client settings.
  
  
  
  Logs and Traces:
  
  Review the system logs and traces for more detailed error messages that can provide additional context on why the user mapping is failing. Use transaction SM21 for system logs and ST22 for dumps.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP documentation on X.509 authentication and user management for detailed steps on configuring and troubleshooting.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to X.509 certificates and user authentication.
  Security Settings: Review the security settings in the SAP system, particularly those related to SSL and user authentication.
  
  By following these steps, you should be able to resolve the error and ensure that the X.509 client certificate is properly mapped to an SAP user account.