This is a hack. Unfortunately I could not find a description of how to put MantisBT behind Apache with NTLM auth.

Set authentication to BASIC_AUTH.

``core/authentication_api.php`` - comment out lines 289-291 to disable password check:

```php
//		if( !auth_does_password_match( $t_user_id, $p_password ) ) {
//			user_increment_failed_login_count( $t_user_id );
//			return false;
//		}
```

``login.php`` line 60 - force user name to remote user and provide some password string:

```php
$f_username = $_SERVER['REMOTE_USER']; //auth_prepare_username( $f_username );
$f_password = 'some_password'; //auth_prepare_password( $f_password );
```

``index.php`` line 39 - change ``login_page.php`` to ``login.php``:

```php
	print_header_redirect( 'login.php' );
```

``layout_api.php`` - comment out lines 505 and 508:

```php
//	echo '<li class="divider"></li>';

	# Logout
//	layout_navbar_menu_item( helper_mantis_url( 'logout_page.php' ), lang_get( 'logout_link' ), 'fa-sign-out' );
```