How To Fix SNC019 - Logon with external ID not activated in this system

SNC019 - Overview

• Message type: E = Error

• Message class: SNC - Secure Network Communication, SNC

• Message number: 019

• Message text: Logon with external ID not activated in this system

What causes this issue?

The system attempted to execute a dialog logon via a server using an
external ID, such as an X.509 certificate. This option must be released
using the profile parameter snc/extid_login_diag.

System Response

The logon was refused and the connection was terminated.

How to fix this error?

The administrator may be able to activate the function by setting the
corresponding profile parameter.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SNC019 - Logon with external ID not activated in this system ?

  The SAP error message SNC019: Logon with external ID not activated in this system typically occurs when a user attempts to log on to an SAP system using an external identity (such as an external authentication method) that has not been properly configured or activated in the system.
  
  Cause:
  
  External ID Not Configured: The system is not set up to accept logons using external identities (like SSO or SNC).
  SNC 
  Configuration Issues: Secure Network Communications (SNC) may not be properly configured in the SAP system.
  User Profile Settings: The user profile may not have the necessary settings to allow external ID logon.
  Authorization Issues: The user may not have the required authorizations to log in using the external ID.
  
  
  Solution:
  
  
  Check SNC Configuration:
  
  Ensure that SNC is properly configured in the SAP system. This includes checking the SNC parameters in the instance profile and ensuring that the SNC library is correctly installed.
  Use transaction RZ10 to check the instance