Tweaks to LDAP stuff

diff --git a/src/models/SigninModel.php b/src/models/SigninModel.php
index 21fc5ab47..f53535265 100755
--- a/src/models/SigninModel.php
+++ b/src/models/SigninModel.php
@@ -58,7 +58,7 @@ class SigninModel extends Model
         $have_ldap_mapping = false;
         $valid_password = false;
         if (C\nsdefined("USE_LDAP") && C\USE_LDAP) {
-            $have_ldap_mapping = function_exists(C\LDAP_LOCAL_NAME);
+            $have_ldap_mapping = function_exists(C\LDAP_LOCAL_USER);
             $use_ldap = true;
             $num_controllers = count(C\LDAP_CONTROLLERS);
             $domain_controller = C\LDAP_CONTROLLERS[rand(0,
@@ -77,7 +77,7 @@ class SigninModel extends Model
                     $filter = "samaccountname=" . $ldap_name;
                     $filter = "(&(objectCategory=person)({$filter}))";
                     if ($results = ldap_search($connection,
-                        C\LDAP_BASE_DOMAIN, $filter, $fields)) {
+                        C\LDAP_BASE_DN, $filter, $fields)) {
                         $entries = ldap_get_entries($connection, $results);
                         $email = $entries[0]['mail'][0] ?? "";
                         $display_name = $entries[0]['displayname'][0] ?? "";