diff --git a/database/migrations/2020_02_04_172100_add_ad_append_domain_settings.php b/database/migrations/2020_02_04_172100_add_ad_append_domain_settings.php
index 4fce7f4558..0a786b7aed 100644
--- a/database/migrations/2020_02_04_172100_add_ad_append_domain_settings.php
+++ b/database/migrations/2020_02_04_172100_add_ad_append_domain_settings.php
@@ -3,6 +3,7 @@
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
+use App\Models\Setting;
 
 class AddAdAppendDomainSettings extends Migration
 {
@@ -16,7 +17,13 @@ class AddAdAppendDomainSettings extends Migration
         Schema::table('settings', function (Blueprint $table) {
             $table->boolean('ad_append_domain')->nullable(false)->default('0');
         });
-    }
+
+        $s = Setting::first(); // we are deliberately *not* using the ::getSettings() method, as it caches things, and our Settings table is being migrated right now
+        if($s->is_ad && $s->ldap_enabled && $s->ad_domain) { //backwards-compatibility setting; < v5 always appended AD Domains
+            $s->ad_append_domain = 1;
+            $s->save();
+        }
+}
 
     /**
      * Reverse the migrations.