diff --git a/README.md b/README.md
index 20d73e7e..4457e402 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 Bitrix module
 =============
 
-Bitrix module for interaction with [RetailCRM](http://www.retailcrm.ru)
+Bitrix module for interaction with [RetailCRM](https://www.retailcrm.ru)
 
 Module allows:
 
@@ -19,4 +19,4 @@ Installation
 
 You should install module through [Bitrix.Marketplace](http://marketplace.1c-bitrix.ru/solutions/intaro.retailcrm/).
 
-[Setup guide](https://docs.retailcrm.ru/ru/Users/Integration/SiteModules/1CBitrix)
+[Setup guide](https://docs.retailcrm.ru/Users/Integration/SiteModules/1CBitrix)
diff --git a/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php b/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
index 7a67a708..9f0e019f 100644
--- a/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
+++ b/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
@@ -458,14 +458,14 @@ class RetailCrmOrder
                 $resCustomersCorporate[$arCustomerCorporate['nickName']] = $arCustomerCorporate;
             }
 
-            $email = $arCustomer['email'] ?? '';
-
-            if (!in_array($email, $resCustomersAdded)) {
-                $resCustomersAdded[] = $email;
+            if (
+                array_key_exists('externalId', $arCustomer)
+                && !in_array($arCustomer['externalId'], $resCustomersAdded, true)
+            ) {
+                $resCustomersAdded[] = $arCustomer['externalId'];
                 $resCustomers[$order['LID']][] = $arCustomer;
             }
 
-            $resCustomers[$order['LID']][] = $arCustomer;
             $ordersPack[$order['LID']][] = $arOrders;
             $recOrders[] = $orderId;
         }