I configured SAM for NTLM authentication according to the System_Admin_Manual. I configured login.php for Windows Authentication, set the keys (security_ntlm_server_var and security_ntlm_authenticate_against) in SAM and changed the System configuration for security in SAM to ntlm_password.
Client and server are in the same domain, and the user exists in SAM with the same login as the domain-login.
Never the less I get an error on the login-page: Unknown Combination of User and Password.
Has someone a more detailed description how to do this?