How To Fix LDAP016 - Authentication mechanism &1 is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAP - LDAP Interface Messages in ABAP

• Message number: 016

• Message text: Authentication mechanism &1 is unknown

What causes this issue?

You want to log on to a directory server with the authenticaton method
&V1&. However, this authentication method is not supported.

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?

If you want to log on with an LDAP system user (Viewcluster VC_LDAP,
maintain <LS>Server</>, field <LS>System logon</>), ensure that the
field <LS>Auth. Mechanism</> (in LDAPUSER view) contains a valid value
(input help).
If you are not using a system user, it is possible that a program error
has occurred.

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 LDAP016 - Authentication mechanism &1 is unknown ?

  The SAP error message LDAP016 indicates that there is an issue with the authentication mechanism specified in the LDAP (Lightweight Directory Access Protocol) configuration. The message typically states that the authentication mechanism you are trying to use is not recognized or is not supported by the system.
  Cause
  The error can occur due to several reasons:
  
  Incorrect Configuration: The authentication mechanism specified in the LDAP configuration is incorrect or misspelled.
  Unsupported Mechanism: The specified authentication mechanism is not supported by the version of SAP or the LDAP server you are using.
  Missing Libraries: Required libraries or components for the specified authentication mechanism may not be installed or configured properly.
  Version Mismatch: There may be a mismatch between the SAP system and the LDAP server regarding supported authentication methods.
  
  Solution
  To resolve the LDAP016 error, you can follow these steps:
  
  
  Check Configuration:
  
  Go to the SAP system and check the LDAP configuration settings. Ensure that the authentication mechanism specified is correct