How to fix error error-ds-auth-unknown in Windows 11

Solution Steps

1. 1 Check the event logs for details: press Windows key + X, select 'Event Viewer', and look under 'Windows Logs > Directory Service' for events related to authentication.
2. 2 If you're using a script, update it to use a supported authentication method like Kerberos. For example, in PowerShell, use 'Get-ADUser -Server domain.com -Credential (Get-Credential)' which uses Kerberos.
3. 3 If you're using a third-party LDAP tool, check its documentation to see what authentication methods it supports. Configure it to use Kerberos or certificate-based authentication.
4. 4 Verify that the domain controller is running a recent version of Windows Server and that all updates are installed. Sometimes the issue is due to a missing update that adds support for newer authentication methods.
5. 5 If the error persists, contact your IT department to ensure that the authentication method you're using is enabled in the domain policy.