diff -Nuar a/vendor/magento/module-negotiable-quote/Plugin/Company/Model/StructurePlugin.php b/vendor/magento/module-negotiable-quote/Plugin/Company/Model/StructurePlugin.php
index 89a413b45..7679c75d0 100644
--- a/vendor/magento/module-negotiable-quote/Plugin/Company/Model/StructurePlugin.php
+++ b/vendor/magento/module-negotiable-quote/Plugin/Company/Model/StructurePlugin.php
@@ -3,38 +3,45 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-
 namespace Magento\NegotiableQuote\Plugin\Company\Model;
 
+use Magento\Company\Model\Company\Structure;
+use Magento\Customer\Model\ResourceModel\Customer\CollectionFactory as CustomerCollectionFactory;
+
 /**
- * Class StructurePlugin
+ * Plugin to filter customer by existing in company structure
  */
 class StructurePlugin
 {
     /**
-     * StructurePlugin constructor.
-     *
-     * @param \Magento\Framework\Api\SearchCriteriaBuilder $searchCriteriaBuilder
-     * @param \Magento\Customer\Api\CustomerRepositoryInterface $customerRepositoryInterface
+     * Size of chunk to filter by customer id
+     */
+    private const SIZE_OF_CHUNK = 10000;
+
+    /**
+     * @var CustomerCollectionFactory
+     */
+    private $customerCollectionFactory;
+
+    /**
+     * @param CustomerCollectionFactory $customerCollectionFactory
      */
     public function __construct(
-        \Magento\Framework\Api\SearchCriteriaBuilder $searchCriteriaBuilder,
-        \Magento\Customer\Api\CustomerRepositoryInterface $customerRepositoryInterface
+        CustomerCollectionFactory $customerCollectionFactory
     ) {
-        $this->searchCriteriaBuilder = $searchCriteriaBuilder;
-        $this->customerRepositoryInterface = $customerRepositoryInterface;
+        $this->customerCollectionFactory = $customerCollectionFactory;
     }
 
     /**
-     * Clear not existing users.
+     * Clear not existing users
      *
-     * @param \Magento\Company\Model\Company\Structure $subject
+     * @param Structure $subject
      * @param array $result
      * @return array
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function afterGetAllowedIds(
-        \Magento\Company\Model\Company\Structure $subject,
+        Structure $subject,
         array $result
     ) {
         if (!empty($result['users'])) {
@@ -45,37 +52,35 @@ class StructurePlugin
     }
 
     /**
-     * Clear not existing company members.
+     * Clear not existing company members
      *
-     * @param \Magento\Company\Model\Company\Structure $subject
+     * @param Structure $subject
      * @param array $result
      * @return array
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function afterGetAllowedChildrenIds(
-        \Magento\Company\Model\Company\Structure $subject,
+        Structure $subject,
         array $result
     ) {
         return $this->filterExistingCustomers($result);
     }
 
     /**
-     * Filter all existing customers.
+     * Filter all existing customers
      *
      * @param array $allChildrenIds
      * @return array
      */
-    private function filterExistingCustomers(array $allChildrenIds)
+    private function filterExistingCustomers(array $allChildrenIds): array
     {
-        $searchCriteria = $this->searchCriteriaBuilder->addFilter('entity_id', $allChildrenIds, 'in')
-            ->create();
-        $existingCustomers = $this->customerRepositoryInterface->getList($searchCriteria)->getItems();
-        $existingChildrenIds = [];
-
-        foreach ($existingCustomers as $existingCustomer) {
-            $existingChildrenIds[] = $existingCustomer->getId();
+        $allIds = [];
+        foreach (array_chunk($allChildrenIds, self::SIZE_OF_CHUNK) as $chunkOfIds) {
+            $collection = $this->customerCollectionFactory->create();
+            $collection->addFieldToFilter($collection->getIdFieldName(), ['in' => $chunkOfIds]);
+            array_push($allIds, ...$collection->getAllIds());
         }
 
-        return $existingChildrenIds;
+        return $allIds;
     }
 }