diff --git a/app/Services/Events/EventMailCalendarSyncService.php b/app/Services/Events/EventMailCalendarSyncService.php
index 3e41dfe..91dcf82 100644
--- a/app/Services/Events/EventMailCalendarSyncService.php
+++ b/app/Services/Events/EventMailCalendarSyncService.php
@@ -9,6 +9,7 @@ use App\Services\Integrations\MailCalendarClient;
 use Carbon\CarbonInterface;
 use Illuminate\Support\Carbon;
 use Illuminate\Support\Facades\Log;
+use Illuminate\Support\Str;
 
 class EventMailCalendarSyncService
 {
@@ -91,7 +92,9 @@ class EventMailCalendarSyncService
                 }
             }
 
-            if ($format === 'hybrid' && filled($content['starts_at'] ?? null)) {
+            if ($entries === [] && filled($content['starts_at'] ?? null)) {
+                $entries[] = $this->mainEventEntry($event, $content);
+            } elseif ($format === 'hybrid' && filled($content['starts_at'] ?? null)) {
                 $entries[] = $this->mainEventEntry($event, $content, ' (in person)');
             }
 
@@ -114,7 +117,7 @@ class EventMailCalendarSyncService
     {
         $sessionId = trim((string) ($session['id'] ?? ''));
         if ($sessionId === '') {
-            return null;
+            $sessionId = 'vs-'.Str::lower(Str::random(12));
         }
 
         $starts = $this->parseDate($session['scheduled_at'] ?? $content['starts_at'] ?? null);
diff --git a/app/Services/Qr/QrPayloadValidator.php b/app/Services/Qr/QrPayloadValidator.php
index 361cad5..7a4f53e 100644
--- a/app/Services/Qr/QrPayloadValidator.php
+++ b/app/Services/Qr/QrPayloadValidator.php
@@ -4,6 +4,7 @@ namespace App\Services\Qr;
 
 use App\Models\QrCode;
 use App\Support\Qr\QrDateFormatter;
+use Illuminate\Support\Str;
 use App\Support\Qr\QrTypeCatalog;
 use Illuminate\Http\UploadedFile;
 use RuntimeException;
@@ -336,6 +337,10 @@ class QrPayloadValidator
             }
 
             $id = trim((string) ($session['id'] ?? ''));
+            if ($id === '') {
+                $id = 'vs-'.Str::lower(Str::random(12));
+            }
+
             $roomType = in_array($session['meet_room_type'] ?? '', ['town_hall', 'webinar'], true)
                 ? (string) $session['meet_room_type']
                 : 'town_hall';
@@ -349,7 +354,7 @@ class QrPayloadValidator
             }
 
             $normalized[] = [
-                'id' => $id !== '' ? mb_substr($id, 0, 64) : null,
+                'id' => mb_substr($id, 0, 64),
                 'title' => mb_substr($title, 0, 120),
                 'meet_room_type' => $roomType,
                 'scheduled_at' => QrDateFormatter::normalize((string) ($session['scheduled_at'] ?? '')),
diff --git a/tests/Feature/EventMailCalendarSyncTest.php b/tests/Feature/EventMailCalendarSyncTest.php
index eacdd8c..fa2a436 100644
--- a/tests/Feature/EventMailCalendarSyncTest.php
+++ b/tests/Feature/EventMailCalendarSyncTest.php
@@ -84,6 +84,33 @@ class EventMailCalendarSyncTest extends TestCase
         )->count());
     }
 
+    public function test_virtual_session_without_id_still_syncs_to_mail_calendar(): void
+    {
+        $owner = User::factory()->create(['public_id' => 'usr-cal-4', 'email' => 'host@example.com']);
+        $event = $this->makeEvent($owner, [
+            'format' => 'virtual',
+            'name' => 'NextGen Summit 2026',
+            'starts_at' => '2026-08-26',
+            'ends_at' => '2026-08-27',
+            'virtual_sessions' => [[
+                'id' => null,
+                'title' => 'NextGen Summit',
+                'scheduled_at' => '2026-08-26',
+                'duration_minutes' => 180,
+            ]],
+        ]);
+
+        app(EventMailCalendarSyncService::class)->sync($event, $owner);
+
+        Http::assertSent(function ($request) use ($event) {
+            return str_contains($request->url(), '/calendar/events')
+                && str_starts_with((string) $request['external_ref'], 'events:'.$event->id.':session:vs-')
+                && $request['title'] === 'NextGen Summit';
+        });
+
+        $this->assertNotEmpty(data_get($event->fresh()->payload, 'calendar_sync.items'));
+    }
+
     public function test_uses_linked_mailbox_when_available(): void
     {
         Http::fake([