How To Fix SPN028 - Check user in Active Directory - &1

SAP Error Message - Details

• Message type: E = Error

• Message class: SPN - SPnego

• Message number: 028

• Message text: Check user in Active Directory - &1

&PREREQUISITES&
You have installed and licensed SAP Single Sign-On 2.0 or higher. It
comes with a front-end control that enables you to validate users from
the Active Directory database of the Microsoft Windows domain
controller. See SAP Note 1943266.

What causes this issue?

This message comes from Active Directory.
This function tries to verify whether the selected Kerberos Principal
Name exists in Active Directory. The <ZH>Check User Principal in AD</>
button enables you to validate the Kerberos Principal User against
Active Directory. You enter the password of Active Directory, and the
front-end control checks whether Active Directory has a user with this
Kerberos Principal Name in the <ZH>userPrincipalName</> attribute.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you get this error message, contact your Active Directory
administrator. Make sure that the Active Directory administrator
configures this user correctly in Active Directory.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SPN028 - Check user in Active Directory - &1 ?

  The SAP error message SPN028, which states "Check user in Active Directory - &1," typically indicates an issue related to the integration between SAP and Active Directory (AD). This error often arises when there are problems with user authentication or when the system is unable to find the specified user in Active Directory.
  Cause:
  
  User Not Found: The user specified in the error message (&1) does not exist in Active Directory.
  Incorrect Configuration: There may be misconfigurations in the SAP system regarding the connection to Active Directory.
  Network Issues: There could be network connectivity issues preventing SAP from reaching the Active Directory server.
  Permissions: The SAP system may not have the necessary permissions to query Active Directory.
  Service Principal Name (SPN) Issues: If the SPN is not correctly set up for the SAP service account, it can lead to authentication failures.
  
  Solution:
  
  Verify User Existence: Check in Active Directory to ensure that the user specified in the error message exists and is active.
  Check Configuration: Review the configuration settings in SAP for the connection to Active Directory. Ensure that the LDAP settings are correct.
  Network Connectivity: Test the network connection between the SAP system and the Active Directory server. Ensure that there are no firewalls or network policies blocking access.
  Permissions: Ensure that the SAP service account has the necessary permissions to query Active Directory. This may involve checking group memberships and permissions in AD.
  SPN Configuration: If applicable, verify that the Service Principal Name (SPN) is correctly configured for the SAP service account. You may need to register the SPN using the setspn command in Windows.
  Logs and Traces: Check the SAP logs and traces for more detailed error messages that can provide additional context for the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SPN028 for any specific patches or updates that may address this issue.
  Active Directory Documentation: Review Microsoft documentation on Active Directory and LDAP for best practices on user management and authentication.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis team or consulting with SAP support for further assistance.