diff --git a/engine/apps/slack/views.py b/engine/apps/slack/views.py
index 3f312cb2..b22e0ba2 100644
--- a/engine/apps/slack/views.py
+++ b/engine/apps/slack/views.py
@@ -270,6 +270,11 @@ class SlackEventApiEndpointView(APIView):
                 # Open pop-up to inform user why OnCall bot doesn't work if any action was triggered
                 self._open_warning_window_if_needed(payload, slack_team_identity, warning_text)
                 return Response(status=200)
+        elif not slack_user_identity.users.exists():
+            # Means that slack_user_identity doesn't have any connected user
+            # Open pop-up to inform user why OnCall bot doesn't work if any action was triggered
+            self._open_warning_for_unconnected_user(sc, payload)
+            return Response(status=200)
 
         action_record = SlackActionRecord(user=user, organization=organization, payload=payload)