diff --git a/config/auth.php b/config/auth.php
index 189babdc0a..1b49d38409 100644
--- a/config/auth.php
+++ b/config/auth.php
@@ -33,10 +33,11 @@ return [
     |
     */
 
-    'defaults' => [
+    'defaults'     => [
         'guard'     => envNonEmpty('AUTHENTICATION_GUARD', 'web'),
         'passwords' => 'users',
     ],
+    'guard_header' => envNonEmpty('AUTHENTICATION_GUARD_HEADER', 'REMOTE_USER'),
 
     /*
     |--------------------------------------------------------------------------
diff --git a/config/ldap_auth.php b/config/ldap_auth.php
index 2f395c809b..f661236d38 100644
--- a/config/ldap_auth.php
+++ b/config/ldap_auth.php
@@ -245,9 +245,9 @@ return [
         */
 
         'windows' => [
-            'enabled'         => envNonEmpty('WINDOWS_SSO_ENABLED', false),
-            'locate_users_by' => envNonEmpty('WINDOWS_SSO_DISCOVER', 'samaccountname'),
-            'server_key'      => envNonEmpty('WINDOWS_SSO_KEY', 'AUTH_USER'),
+            'enabled'         => false,
+            'locate_users_by' => 'samaccountname',
+            'server_key'      => 'AUTH_USER',
         ],
     ],