How To Fix SPN016 - No Service Principal Names found

SAP Error Message - Details

• Message type: E = Error

• Message class: SPN - SPnego

• Message number: 016

• Message text: No Service Principal Names found

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 SPN016 - No Service Principal Names found ?

  The SAP error message SPN016 "No Service Principal Names found" typically occurs in the context of SAP systems that are integrated with Kerberos authentication. This error indicates that the system is unable to find the necessary Service Principal Names (SPNs) for the SAP service account in Active Directory (AD). SPNs are unique identifiers for services running on servers, and they are essential for Kerberos authentication to work correctly.
  Causes:
  
  Missing SPNs: The most common cause is that the required SPNs have not been registered in Active Directory for the SAP service account.
  Incorrect Configuration: The SAP system may not be correctly configured to use Kerberos authentication.
  Service Account Issues: The service account used by the SAP system may not have the necessary permissions or may not be set up correctly in AD.
  DNS Issues: Problems with DNS resolution can also lead to this error, as SPNs are often tied to specific hostnames.
  
  Solutions:
  
  
  Register SPNs:
  
  Use the setspn command to register the necessary SPNs for the SAP service account. The command typically looks like this:
  setspn -A SAP/<SAP_SID> <ServiceAccount>
  setspn -A SAP/<SAP_SID>/<hostname> <ServiceAccount>
  
  Replace <SAP_SID> with your SAP system ID and <ServiceAccount> with the name of the service account used by SAP.
  
  
  
  Verify SPNs:
  
  You can check the existing SPNs for a service account using:
  setspn -L <ServiceAccount>
  
  Ensure that the required SPNs are listed.
  
  
  
  Check Service Account Permissions:
  
  Ensure that the service account has the necessary permissions in Active Directory to register SPNs.
  
  
  
  Review SAP Configuration:
  
  Check the SAP profile parameters related to Kerberos authentication, such as icm/HTTP/authentication and login/kerberos/enable.
  Ensure that the SAP system is configured to use the correct Kerberos realm.
  
  
  
  DNS Configuration:
  
  Ensure that the hostname used in the SPN matches the DNS name of the server where the SAP system is running.
  Verify that the DNS settings are correct and that the server can resolve its own hostname.
  
  
  
  Restart Services:
  
  After making changes, restart the SAP services to ensure that the new configurations take effect.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP's official documentation on Kerberos authentication for detailed steps on configuring SPNs and troubleshooting authentication issues.
  Active Directory: Familiarize yourself with Active Directory management, especially regarding SPNs and service accounts.
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or updates related to this error.
  
  If the issue persists after following these steps, consider reaching out to your system administrator or SAP support for further assistance.