diff --git a/intaro.retailcrm/classes/general/RetailcrmConfigProvider.php b/intaro.retailcrm/classes/general/RetailcrmConfigProvider.php
index 6aaaa6de..789db8b6 100644
--- a/intaro.retailcrm/classes/general/RetailcrmConfigProvider.php
+++ b/intaro.retailcrm/classes/general/RetailcrmConfigProvider.php
@@ -517,6 +517,16 @@ class RetailcrmConfigProvider
         return static::$shops;
     }
 
+    /**
+     * isPhoneRequired
+     *
+     * @return bool|string|null
+     */
+    public static function isPhoneRequired()
+    {
+        return COption::GetOptionString("main", "new_user_phone_required") === 'Y';
+    }
+
     /**
      * Wraps Bitrix COption::GetOptionString(...)
      *
diff --git a/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php b/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
index 0e2a5683..c137aa1b 100644
--- a/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
+++ b/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
@@ -81,6 +81,13 @@ class RetailCrmHistory
                     continue;
                 }
 
+                if (RetailcrmConfigProvider::isPhoneRequired()) {
+                    if (empty($customer['phones'])) {
+                        Logger::getInstance()->write('$customer["phones"] is empty. Customer ' . $customer['id'] . ' cannot be created', 'createCustomerError');
+                        continue;
+                    }
+                }
+
                 if (isset($customer['externalId']) && !is_numeric($customer['externalId'])) {
                     unset($customer['externalId']);
                 }
@@ -368,6 +375,13 @@ class RetailCrmHistory
                             continue;
                         }
 
+                        if (RetailcrmConfigProvider::isPhoneRequired()) {
+                            if (empty($order['customer']['phones'])) {
+                                Logger::getInstance()->write('$customer["phones"] is empty. Order ' . $order['id'] . ' cannot be created', 'createCustomerError');
+                                continue;
+                            }
+                        }
+
                         $login = null;
                         $registerNewUser = true;
 
diff --git a/intaro.retailcrm/lang/ru/options.php b/intaro.retailcrm/lang/ru/options.php
index 4f85b282..9e3bbd30 100644
--- a/intaro.retailcrm/lang/ru/options.php
+++ b/intaro.retailcrm/lang/ru/options.php
@@ -104,3 +104,4 @@ $MESS['ROUND_HEADER'] = "При включенной опции округлен
 
 $MESS['PURCHASE_ICML'] = "При включенной опции в генерации icml будет добавлен сброс закупочной цены на 0 если она не указана";
 $MESS['PURCHASE_HEADER'] = "Сброс закупочной цены в icml";
+$MESS['PHONE_REQUIRED'] = "В настройках главного модуля была включена опция «Номер телефона является обязательным», что может вызвать проблемы с обратной синхронизацией. Для корректной работы необходимо отключить данную опцию.";
diff --git a/intaro.retailcrm/options.php b/intaro.retailcrm/options.php
index 3d6bb143..27ff35db 100644
--- a/intaro.retailcrm/options.php
+++ b/intaro.retailcrm/options.php
@@ -60,6 +60,10 @@ if(!CModule::IncludeModule('intaro.retailcrm') || !CModule::IncludeModule('sale'
 $_GET['errc'] = htmlspecialchars(trim($_GET['errc']));
 $_GET['ok'] = htmlspecialchars(trim($_GET['ok']));
 
+if (RetailcrmConfigProvider::isPhoneRequired()) {
+    echo ShowMessage(array("TYPE"=>"ERROR", "MESSAGE"=>GetMessage('PHONE_REQUIRED')));
+}
+
 if($_GET['errc']) echo CAdminMessage::ShowMessage(GetMessage($_GET['errc']));
 if($_GET['ok'] && $_GET['ok'] == 'Y') echo CAdminMessage::ShowNote(GetMessage('ICRM_OPTIONS_OK'));