How To Fix WK601 - LDAP server & does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: WK - BPT: Messages integr. inbox

• Message number: 601

• Message text: LDAP server & does not exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WK601 - LDAP server & does not exist ?

  Certainly! Here's a detailed explanation regarding the SAP error message WK601: LDAP server & does not exist:
  
  Error Message
  WK601: LDAP server & does not exist
  
  Cause
  This error occurs when SAP tries to connect to an LDAP server (Lightweight Directory Access Protocol) for user authentication, user information retrieval, or other directory services, but the specified LDAP server is not found or is unreachable.
  Common causes include:
  
  The LDAP server name or address configured in SAP is incorrect or misspelled.
  The LDAP server is down or not reachable due to network issues.
  The LDAP server configuration in SAP (such as in transaction SICF, SU01, or LDAP configuration) is missing or incomplete.
  Firewall or security settings blocking the connection between SAP and the LDAP server.
  The LDAP server is not registered or defined in the SAP system.
  
  
  Solution
  To resolve the WK601 error, follow these steps:
  
  
  Check LDAP Server Configuration in SAP:
  
  Go to transaction LDAP (or LDAP Browser) or the relevant configuration transaction (e.g., SU01 for user authentication).
  Verify the LDAP server name or IP address is correctly entered.
  Ensure the port number and protocol (usually LDAP on port 389 or LDAPS on 636) are correct.
  
  
  
  Test Network Connectivity:
  
  From the SAP application server, test connectivity to the LDAP server using ping or telnet to the LDAP port.
  Example: telnet ldapserver 389 or ping ldapserver
  If unreachable, check network/firewall settings.
  
  
  
  Check LDAP Server Status:
  
  Verify that the LDAP server is up and running.
  Contact your network or system administrator to confirm the LDAP service status.
  
  
  
  Review SAP System Logs:
  
  Use transaction SM21 or ST22 to check for related errors or dumps.
  Look for additional clues about LDAP connection failures.
  
  
  
  Update or Correct LDAP Server Entries:
  
  If the LDAP server has changed or been renamed, update the SAP configuration accordingly.
  In some cases, you may need to define the LDAP server in the SAP system profile or via transaction RZ10.
  
  
  
  Check User Authentication Settings:
  
  If LDAP is used for user authentication, verify the settings in SU01 or SICF.
  Ensure the LDAP server is properly linked to the authentication method.
  
  
  
  Consult SAP Notes and Documentation:
  
  Search SAP Support Portal for notes related to WK601 or LDAP connectivity issues.
  Sometimes patches or specific configuration steps are recommended.
  
  
  
  
  Related Information
  
  LDAP in SAP: LDAP is commonly used in SAP environments for centralized user management and authentication.
  Transactions to check/configure LDAP:
  
  LDAP (LDAP Browser)
  SU01 (User Maintenance)
  SICF (Internet Communication Framework)
  RZ10 (Profile Parameter Maintenance)
  
  
  Common LDAP ports: 389 (LDAP), 636 (LDAPS - secure LDAP)
  SAP Notes: Check SAP Notes such as 000123456 (example) for specific fixes or configuration guides.
  Security: Ensure secure communication (LDAPS) if sensitive data is transmitted.
  Network: Firewall rules must allow SAP servers to communicate with LDAP servers on the required ports.
  
  
  If you provide more context (e.g., when the error occurs, system version), I can help with more tailored advice.