How to fix error error-ds-auth-method-not-supported in Windows 11

Solution Steps

1. 1 Press Windows key + R, type 'dsa.msc', and press Enter. This opens Active Directory Users and Computers.
2. 2 In the left pane, right-click on your domain and select 'Properties'. Go to the 'Group Policy' tab and click 'Open' to open the Group Policy Management Console.
3. 3 Navigate to Computer Configuration → Policies → Windows Settings → Security Settings → Local Policies → Security Options. Look for policies like 'Network security: LAN Manager authentication level' and 'Network security: Restrict NTLM: Incoming NTLM traffic'.
4. 4 Adjust these policies to allow the authentication method your client is using. For example, if your client uses NTLM, set the LAN Manager authentication level to 'Send NTLMv2 response only' or lower. If using Kerberos, ensure Kerberos is not blocked.
5. 5 After changing policies, force a Group Policy update: Press Windows key + R, type 'cmd', and press Ctrl+Shift+Enter. Type 'gpupdate /force' and press Enter. This applies the new policies immediately.
6. 6 If the error persists, check the client's authentication settings. On the client machine, open Command Prompt as admin and type 'klist' to view Kerberos tickets. If there are issues, type 'klist purge' to clear them, then try again.