How To Fix CLB201 - External user ID does not exist for user '&1'

CLB201 - Overview

• Message type: E = Error

• Message class: CLB - SAIL: Common messages

• Message number: 201

• Message text: External user ID does not exist for user '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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CLB201 - Details

• The SAP error message CLB201 indicates that the external user ID specified does not exist for the user in question. This error typically arises in scenarios involving user management, particularly when integrating with external systems or when using external user IDs for authentication or authorization.
  
  Cause:
  
  Non-existent User ID: The external user ID provided does not match any existing user in the SAP system.
  Incorrect Configuration: There may be a misconfiguration in the user management settings or in the integration with external systems.
  User Deactivation: The user associated with the external user ID may have been deactivated or deleted.
  Data Synchronization Issues: If the system is integrated with an external identity provider, there may be synchronization issues leading to the external user ID not being recognized.
  
  
  Solution:
  
  Verify User ID: Check the external user ID being used and ensure it is correct. Look for typos or formatting issues.
  Check User Existence: Use transaction codes like SU01 to verify