How To Fix LDAP_DELAYED_AUTH009 - User &1 found more than once in LDAP server &2 (1: "&3", 2: "&4")

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAP_DELAYED_AUTH - LDAP Delayed Authentication

• Message number: 009

• Message text: User &1 found more than once in LDAP server &2 (1: "&3", 2: "&4")

What causes this issue?

The user of the SAP system for which the process of delayed
authentication against a directory service should be prepared exists
multiple times in the directory service, so that it is not determinable
for the SAP system for which of those users the authentication shall be
executed.

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

Ensure that the filter attribute which is used to identify the SAP users
in the directory service is unique.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LDAP_DELAYED_AUTH009 - User &1 found more than once in LDAP server &2 (1: "&3", 2: "&4") ?

  The SAP error message LDAP_DELAYED_AUTH009 indicates that there is a problem with duplicate user entries in the LDAP (Lightweight Directory Access Protocol) server. Specifically, it means that the user identified by &1 (the username) has been found more than once in the LDAP server identified by &2 (the LDAP server name). The additional parameters &3 and &4 provide further context, such as the distinguished names (DNs) of the duplicate entries.
  Cause
  The primary cause of this error is the presence of multiple entries for the same user in the LDAP directory. This can happen due to various reasons, including:
  
  Incorrect synchronization between the SAP system and the LDAP server.
  Manual entry errors where the same user is created multiple times.
  Issues with the LDAP schema or configuration that allow duplicate entries.
  
  Solution
  To resolve the LDAP_DELAYED_AUTH009 error, you can follow these steps:
  
  
  Identify Duplicate Entries:
  
  Use an LDAP browser or command-line tools to query the LDAP server for the