How To Fix LDAPRC048 - Verification is unsuitable for authentication method

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAPRC - LDAP Interface Messages in C

• Message number: 048

• Message text: Verification is unsuitable for authentication method

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 LDAPRC048 - Verification is unsuitable for authentication method ?

  The SAP error message "LDAPRC048 Verification is unsuitable for authentication method" typically occurs when there is a mismatch or misconfiguration in the authentication method being used in conjunction with LDAP (Lightweight Directory Access Protocol) for user authentication in an SAP system.
  Cause:
  
  
  Incompatible Authentication Method: The error usually indicates that the authentication method configured in the SAP system does not support the verification method being used. For example, if the system is set to use Kerberos authentication but the LDAP server is configured for a different method, this error may arise.
  
  
  Configuration Issues: There may be issues in the configuration of the LDAP server or the SAP system, such as incorrect parameters or settings that do not align with the expected authentication methods.
  
  
  User Credentials: The user credentials being used may not be compatible with the authentication method configured. For instance, if the LDAP server requires a certain type of password hashing or encryption that is not supported by the SAP system.
  
  
  Solution:
  
  
  Check Authentication Method: Verify the authentication method configured in the SAP system. Ensure that it matches the method supported by the LDAP server. Common methods include simple bind, SASL, and Kerberos.
  
  
  Review LDAP Configuration: Check the LDAP configuration in the SAP system (transaction code LDAP or SU01 for user settings) to ensure that all parameters are correctly set. This includes the LDAP server address, port, and any required security settings.
  
  
  User Mapping: Ensure that the user mapping between SAP and LDAP is correctly configured. This includes checking the user IDs and ensuring they match between the two systems.
  
  
  Test Connectivity: Use tools like ldapsearch to test connectivity and authentication against the LDAP server to ensure that the server is reachable and that the credentials are valid.
  
  
  Consult Documentation: Refer to the SAP documentation for LDAP integration to ensure that all steps have been followed correctly. This includes checking for any specific requirements or limitations related to the authentication methods.
  
  
  Logs and Traces: Check the SAP system logs (transaction SM21) and the LDAP server logs for any additional error messages or warnings that could provide more context on the issue.
  
  
  Update SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to LDAP authentication.
  
  
  Related Information:
  
  SAP Documentation: Review the official SAP documentation on LDAP integration and authentication methods.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  LDAP Server Documentation: Consult the documentation for the specific LDAP server being used (e.g., OpenLDAP, Microsoft Active Directory) for details on supported authentication methods and configurations.
  
  By following these steps, you should be able to identify and resolve the cause of the LDAPRC048 error in your SAP system.