<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Directory\DeletedItems\Item\Restore\RestorePostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new RestorePostRequestBody();
$additionalData = [
'autoReconcileProxyConflict' => true,
];
$requestBody->setAdditionalData($additionalData);
$result = $graphServiceClient->directory()->deletedItems()->byDirectoryObjectId('directoryObject-id')->restore()->post($requestBody)->wait();