ENGCOM-3868: [Backport] Fix issue causing attribute not loading when using getList #20284

 - Merge Pull Request #20284 from GovindaSharma/magento2:2.2-develop-PR-port-19620
 - Merged commits:
   1. 0600244
   2. a59c0b4

Author: magento-engcom-team

app/code/Magento/Backend/Model/Search/Customer.php

@@ -89,7 +89,7 @@ public function load()
 
         $this->searchCriteriaBuilder->setCurrentPage($this->getStart());
         $this->searchCriteriaBuilder->setPageSize($this->getLimit());
-        $searchFields = ['firstname', 'lastname', 'company'];
+        $searchFields = ['firstname', 'lastname', 'billing_company'];
         $filters = [];
         foreach ($searchFields as $field) {
             $filters[] = $this->filterBuilder

app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php

@@ -365,7 +365,7 @@ public function getList(SearchCriteriaInterface $searchCriteria)
             ->joinAttribute('billing_telephone', 'customer_address/telephone', 'default_billing', null, 'left')
             ->joinAttribute('billing_region', 'customer_address/region', 'default_billing', null, 'left')
             ->joinAttribute('billing_country_id', 'customer_address/country_id', 'default_billing', null, 'left')
-            ->joinAttribute('company', 'customer_address/company', 'default_billing', null, 'left');
+            ->joinAttribute('billing_company', 'customer_address/company', 'default_billing', null, 'left');
 
         $this->collectionProcessor->process($searchCriteria, $collection);
 

app/code/Magento/Customer/Test/Unit/Model/ResourceModel/CustomerRepositoryTest.php

@@ -740,7 +740,7 @@ public function testGetList()
             ->willReturnSelf();
         $collection->expects($this->at(7))
             ->method('joinAttribute')
-            ->with('company', 'customer_address/company', 'default_billing', null, 'left')
+            ->with('billing_company', 'customer_address/company', 'default_billing', null, 'left')
             ->willReturnSelf();
         $this->collectionProcessorMock->expects($this->once())
             ->method('process')