How To Fix LDAPRC052 - LDAP server is not available

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAPRC - LDAP Interface Messages in C

• Message number: 052

• Message text: LDAP server is not available

What causes this issue?

This message is triggered if there is no connection can be created
between the host on which the LDAP Connector is running and the
directory. Either the directory server is not active, or the network
connection is not open, for example due to a firewall on the port used.

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?

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 LDAPRC052 - LDAP server is not available ?

  The SAP error message "LDAPRC052: LDAP server is not available" indicates that the SAP system is unable to connect to the specified LDAP (Lightweight Directory Access Protocol) server. This can occur due to various reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the LDAP server.
  LDAP Server Down: The LDAP server itself may be down or not responding.
  Configuration Errors: Incorrect configuration settings in the SAP system for the LDAP connection (e.g., wrong server address, port number, or credentials).
  Firewall Restrictions: Firewalls or security groups may be blocking the connection to the LDAP server.
  DNS Resolution Issues: The SAP system may not be able to resolve the hostname of the LDAP server.
  SSL/TLS Issues: If the connection is secured using SSL/TLS, there may be issues with certificates or the configuration of secure connections.
  
  Solutions:
  
  
  Check 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 outages or issues.
  
  
  
  Verify LDAP Server Status:
  
  Check if the LDAP server is running and accessible. You may need to contact the administrator of the LDAP server.
  
  
  
  Review Configuration Settings:
  
  Go to the SAP system configuration for LDAP (transaction code LDAP or SU01 for user settings) and verify that the server address, port, and credentials are correct.
  Ensure that the LDAP server is configured to accept connections from the SAP system.
  
  
  
  Check Firewall Settings:
  
  Ensure that any firewalls between the SAP system and the LDAP server allow traffic on the required ports (typically port 389 for LDAP and 636 for LDAPS).
  
  
  
  DNS Configuration:
  
  If using a hostname for the LDAP server, ensure that the SAP system can resolve it correctly. You can test this by using the nslookup command.
  
  
  
  SSL/TLS Configuration:
  
  If using LDAPS, ensure that the SSL certificates are correctly installed and configured on both the SAP and LDAP servers.
  Check for any certificate expiration issues.
  
  
  
  Logs and Traces:
  
  Check the SAP system logs (transaction SM21) and the LDAP server logs for any additional error messages that might provide more context.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to LDAP connectivity.
  Documentation: Review the SAP documentation for LDAP integration, which may provide additional configuration details and troubleshooting steps.
  Support: If the issue persists, consider reaching out to SAP support or your LDAP server administrator for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the "LDAPRC052: LDAP server is not available" error in your SAP system.