How To Fix SUSR_CERT028 - Certificate is blocked

SAP Error Message - Details

• Message type: E = Error

• Message class: SUSR_CERT - User Certificates Administration

• Message number: 028

• Message text: Certificate is blocked

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SUSR_CERT028 - Certificate is blocked ?

  The SAP error message SUSR_CERT028: Certificate is blocked typically occurs in the context of user authentication and digital certificates within the SAP system. This error indicates that a user's digital certificate has been blocked, which prevents them from accessing certain functionalities or logging into the system.
  Causes:
  
  Manual Blocking: The certificate may have been manually blocked by an administrator due to security concerns or policy violations.
  Expired Certificate: The certificate may have expired, leading to it being automatically blocked.
  Revocation: The certificate may have been revoked due to a security breach or other issues.
  Multiple Failed Login Attempts: If there are multiple failed login attempts associated with the certificate, it may be blocked as a security measure.
  Configuration Issues: There may be issues with the configuration of the certificate authority or the SAP system itself.
  
  Solutions:
  
  
  Unblock the Certificate:
  
  An administrator can unblock the certificate using transaction code SU01 (User Maintenance) or SICF (HTTP Service Maintenance) depending on the context.
  Navigate to the user’s profile and check the status of the certificate. If it is blocked, the administrator can unblock it.
  
  
  
  Renew the Certificate:
  
  If the certificate is expired, it needs to be renewed. This typically involves generating a new certificate and ensuring it is properly installed in the SAP system.
  
  
  
  Check Certificate Authority:
  
  Ensure that the certificate authority (CA) that issued the certificate is trusted and properly configured in the SAP system.
  
  
  
  Review Security Policies:
  
  Review the security policies related to certificate management to ensure that they are not overly restrictive.
  
  
  
  Audit Logs:
  
  Check the audit logs for any suspicious activity that may have led to the blocking of the certificate. This can help in understanding the root cause and preventing future occurrences.
  
  
  
  Contact SAP Support:
  
  If the issue persists or if there are complexities involved, it may be necessary to contact SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SU01 for user management, SICF for service maintenance, and STRUST for managing SSL certificates.
  Documentation: Refer to SAP documentation regarding user management and digital certificates for detailed procedures and best practices.
  Security Best Practices: Implement best practices for managing digital certificates, including regular audits, timely renewals, and monitoring for unauthorized access attempts.
  
  By addressing the underlying cause of the certificate being blocked and following the appropriate steps, you can resolve the SUSR_CERT028 error and restore access to the affected user.