How To Fix 1S520 - Certificate has expired and is no longer valid

SAP Error Message - Details

• Message type: E = Error

• Message class: 1S - Messages for SSF ("Secure Store & Forward")

• Message number: 520

• Message text: Certificate has expired and is no longer valid

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• What is the cause and solution for SAP error message 1S520 - Certificate has expired and is no longer valid ?

  The SAP error message 1S520 indicates that a certificate used in the system has expired and is no longer valid. This can occur in various contexts, such as when using secure connections (SSL/TLS) or when dealing with digital signatures.
  Cause:
  
  Expired Certificate: The most common cause is that the certificate has reached its expiration date and is no longer valid for secure communications or authentication.
  Incorrect System Time: If the system time is incorrect, it may incorrectly interpret a valid certificate as expired.
  Certificate Revocation: The certificate may have been revoked by the issuing authority before its expiration date.
  
  Solution:
  
  
  Renew the Certificate:
  
  Obtain a new certificate from a trusted Certificate Authority (CA).
  Install the new certificate in the appropriate keystore or truststore in your SAP system.
  Ensure that the new certificate is properly configured in the relevant SAP system settings.
  
  
  
  Check System Time:
  
  Verify that the system time and timezone settings are correct on the server where SAP is running. An incorrect system time can lead to misinterpretation of certificate validity.
  
  
  
  Update Trust Store:
  
  If the expired certificate is part of a trust store, ensure that the trust store is updated with the new certificate.
  Use transaction STRUST in SAP to manage SSL certificates and trust relationships.
  
  
  
  Check for Revocation:
  
  If the certificate was revoked, check with the issuing CA to understand the reason for revocation and obtain a new certificate if necessary.
  
  
  
  Restart Services:
  
  After updating or renewing the certificate, restart the relevant SAP services to ensure that the changes take effect.
  
  
  
  Related Information:
  
  Transaction STRUST: This transaction is used to manage SSL certificates in SAP. You can view, import, and export certificates here.
  Certificate Authorities: Ensure that you are using a reputable CA for obtaining certificates.
  Documentation: Refer to SAP's official documentation for detailed steps on managing SSL certificates and troubleshooting related issues.
  Monitoring: Implement monitoring for certificate expiration to avoid future occurrences of this issue. Tools or scripts can be set up to alert administrators before certificates expire.
  
  By following these steps, you should be able to resolve the error message 1S520 and restore the functionality that relies on the expired certificate.