How To Fix LDAPRC049 - Could not logon to directory

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAPRC - LDAP Interface Messages in C

• Message number: 049

• Message text: Could not logon to directory

What causes this issue?

The combination of user name (DN) and password transferred to the
directory was not accepted by the directory.

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?

Check the set or entered data for the user and password for the
directory.
If you are using an application with which you do not need to enter
this data directly, you can find the data as configuration setting in
the LDAP server used ("System User" field).

Procedure for System Administrators

Check whether you can log on to the directory with the entered data
using the LDAP protocol.
Note: A frequent error when using the Microsoft Active Directory is
that the user enters their Microsoft Windows user name instead of
the full Distinguished Name, since it is also possible to log on to
the directory using this Microsoft Windows logon with Microsoft tools
(such as ldp.exe). However, these tools do not use the user/password
logon used by the SAP system.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LDAPRC049 - Could not logon to directory ?

  The SAP error message LDAPRC049: Could not logon to directory typically indicates an issue with the connection to the LDAP (Lightweight Directory Access Protocol) server. This error can arise due to various reasons, including configuration issues, network problems, or authentication failures. Below are some common causes, potential solutions, and related information for this error:
  Causes:
  
  Incorrect LDAP Configuration: The LDAP server settings in the SAP system may be incorrect, including the server address, port number, or base DN (Distinguished Name).
  Authentication Issues: The credentials (username and password) used to connect to the LDAP server may be incorrect or have insufficient permissions.
  Network Issues: There may be network connectivity problems preventing the SAP system from reaching the LDAP server.
  LDAP Server Down: The LDAP server itself may be down or experiencing issues.
  Firewall Restrictions: Firewalls or security groups may be blocking the connection to the LDAP server.
  SSL/TLS Configuration: If the LDAP server requires a secure connection, issues with SSL/TLS configuration may prevent successful authentication.
  
  Solutions:
  
  
  Verify LDAP Configuration:
  
  Check the LDAP server settings in the SAP system (transaction code LDAP or SU01 for user settings).
  Ensure that the server address, port, and base DN are correctly configured.
  
  
  
  Check Credentials:
  
  Verify that the username and password used for LDAP authentication are correct.
  Ensure that the user has the necessary permissions to access the LDAP directory.
  
  
  
  Test Network Connectivity:
  
  Use tools like ping or telnet to check if the SAP system can reach the LDAP server on the specified port.
  Ensure that there are no network issues or outages.
  
  
  
  Check LDAP Server Status:
  
  Confirm that the LDAP server is running and accessible.
  Check the server logs for any errors or issues.
  
  
  
  Review Firewall Settings:
  
  Ensure that any firewalls or security groups allow traffic between the SAP system and the LDAP server on the required ports.
  
  
  
  SSL/TLS Configuration:
  
  If using SSL/TLS, ensure that the certificates are correctly configured and trusted by the SAP system.
  Check the SSL settings in the SAP system and ensure they match the LDAP server's requirements.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to LDAP integration for any known issues or patches.
  Documentation: Refer to the SAP documentation for LDAP configuration and troubleshooting.
  Logs: Review the SAP system logs (transaction SM21) and LDAP server logs for additional error messages that may provide more context.
  
  If the issue persists after trying the above solutions, consider reaching out to your system administrator or SAP support for further assistance.