diff --git a/app/Jobs/Mail/NinjaMailerJob.php b/app/Jobs/Mail/NinjaMailerJob.php
index da3e02d04da8..34ebd668c65e 100644
--- a/app/Jobs/Mail/NinjaMailerJob.php
+++ b/app/Jobs/Mail/NinjaMailerJob.php
@@ -584,6 +584,9 @@ class NinjaMailerJob implements ShouldQueue
             $guzzle = new \GuzzleHttp\Client();
             $url = 'https://login.microsoftonline.com/common/oauth2/v2.0/token';
 
+            if(!$user->oauth_user_refresh_token || $user->oauth_user_refresh_token == '')
+                return false;
+
             $token = json_decode($guzzle->post($url, [
                 'form_params' => [
                     'client_id' => config('ninja.o365.client_id') ,