Error
Error Code:
10
SAP S/4HANA Error 10: Authentication Failed Login Issues
Description
This error indicates that the system could not verify the provided user credentials or identity. It commonly occurs during login attempts or when an SAP S/4HANA process tries to access a protected resource without valid authentication, preventing access or operation.
Error Message
ERR_AUTHENTICATION_FAILED
Known Causes
4 known causesInvalid Credentials
The username or password entered does not match the records in the SAP S/4HANA system.
Locked or Inactive Account
The user account may have been locked after multiple failed login attempts, or it could be inactive due to administrative policies.
Password Expired
The user's password has passed its validity period and needs to be reset before access can be granted.
System Configuration Issues
Misconfigurations in authentication settings, user roles, or issues with Single Sign-On (SSO) providers can prevent successful authentication.
Solutions
4 solutions available1. Verify User Credentials and System Access easy
Check if the username and password are correct and if the user has the necessary authorizations.
1
Confirm the username and password being used for login are accurate. Ensure there are no typos and that Caps Lock is not active.
2
If connecting to a specific SAP system, verify the client number is correct. Incorrect client numbers can lead to authentication failures.
3
Access SAP GUI or the relevant S/4HANA interface and attempt to log in with the same credentials. If this fails, the issue is likely with the user account itself or its authorizations.
4
Consult an SAP security administrator to verify the user account is active, not locked, and possesses the required roles and profiles for S/4HANA access. This might involve checking transaction SU01 (User Maintenance) on the backend.
2. Reset User Password and Unlock Account easy
Force a password reset and unlock the user account if it's locked.
1
Log in to the SAP system using an administrator account with sufficient privileges (e.g., SAP_ALL profile or equivalent).
2
Navigate to transaction SU01 (User Maintenance).
3
Enter the username that is experiencing the authentication failure and click 'Change'.
4
In the 'Logon Data' tab, check the 'Account is locked' checkbox. If it's checked, uncheck it to unlock the account.
5
Go to the 'Change Password' button and reset the password for the user. Provide a temporary password or allow the user to set a new one on their next login.
6
Save the changes. Instruct the user to try logging in again with the new password.
3. Check SAP Gateway Service Status and Configuration medium
Ensure the SAP Gateway service is running and correctly configured for S/4HANA communication.
1
Access the SAP Gateway system or the S/4HANA system where the gateway is hosted.
2
Open transaction SMGW (Gateway Monitor).
3
Verify that the SAP Gateway service is running. Look for 'Gateway is running' or similar status indicators. If it's not running, start it.
4
Check the gateway security settings. In SMGW, go to 'Goto' -> 'Expert Functions' -> 'External Security' -> 'Display'. Ensure that trusted RFC destinations and access control lists (ACLs) are configured correctly to allow the necessary connections.
5
If using SNC (Secure Network Communications) for authentication, verify that the SNC library is correctly configured and that the SNC names of the client and server are consistent.
6
Review the gateway log files (e.g., dev_rd) for any specific error messages related to authentication attempts.
4. Review System and Security Logs for Authentication Failures medium
Analyze system and security logs to pinpoint the root cause of the authentication failure.
1
On the S/4HANA application server, access transaction SM21 (System Log) to view system-wide errors.
2
Filter the logs for entries related to 'authentication', 'login', 'security', or 'authorization' around the time of the failed login attempts. Look for messages that might indicate specific reasons for the failure, such as invalid credentials, expired passwords, or locked accounts.
3
Access transaction ST05 (Performance Trace) and activate the 'SQL Trace' and 'Gateway Trace' for the user experiencing the issue. Reproduce the login attempt and then deactivate the traces. Analyze the trace files for any SQL errors or gateway communication problems during the authentication process.
4
Check the security audit log using transaction SM20. This log records security-relevant events, including failed login attempts. Look for detailed information about why the authentication failed.
5
If the login failure is occurring from a specific client application or interface (e.g., Fiori, external system), check the logs of that application for error messages that can provide more context.