How To Fix T5124 - &1 is not a valid user name (does not exist in user administration)

T5124 - Overview

• Message type: E = Error

• Message class: T5 - SAPphone: Messages for telephony

• Message number: 124

• Message text: &1 is not a valid user name (does not exist in user administration)

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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Smart SAP Assistant

• What is the cause and solution for SAP error message T5124 - &1 is not a valid user name (does not exist in user administration) ?

  The SAP error message T5124 indicates that the user name you are trying to use does not exist in the user administration. This typically occurs when you attempt to log in or perform an action that requires a valid user account, but the specified user name is either incorrect or has not been created in the SAP system.
  
  Cause:
  
  Incorrect User Name: The user name entered may have typographical errors or may not match the existing user names in the system.
  User Not Created: The user account may not have been created in the SAP system.
  User Deactivation: The user account may exist but could be deactivated or locked.
  Authorization Issues: The user may not have the necessary authorizations to perform the action, leading to the system not recognizing the user.
  
  
  Solution:
  
  Verify User Name: Double-check the user name for any spelling errors or incorrect characters.
  Check User Administration:
  Use transaction code SU01 to check if the user exists.
  If