How To Fix 00771 - SNC name and specified user/client do not match

00771 - Overview

• Message type: E = Error

• Message class: 00 -

• Message number: 771

• Message text: SNC name and specified user/client do not match

What causes this issue?

You have used the Secure Network Communication (SNC) function to log
on. At the same time, you specified an R/3 user name. However the
external (SNC) name delivered from the external security system to the
R/3 System is not assigned to the specified user in table USRACL.

System Response

The system refuses the logon.

How to fix this error?

Log on with the permitted user name, or use the user maintenance
transaction (Transaction SU01) to assign the SNC name to the user.

Error message extract from SAP system. Copyright SAP SE.

00771 - Details

• The SAP error message "00771 SNC name and specified user/client do not match" typically occurs in the context of Secure Network Communications (SNC) when there is a mismatch between the SNC name configured for a user and the SNC name that is being used to authenticate that user in the SAP system.
  
  Cause:
  
  SNC Configuration Mismatch: The SNC name defined in the user profile does not match the SNC name being used for the connection. This can happen if the SNC name is incorrectly configured in the user master record or if the SNC name used during the login process is different.
  User Profile Issues: The user profile may not have the correct SNC name assigned, or the SNC name may not be set at all.
  Client-Specific Settings: The error can also occur if the SNC name is client-specific and there are discrepancies in the configuration between different clients in the same SAP system.
  SNC