<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Security\TiIndicators\DeleteTiIndicatorsByExternalId\DeleteTiIndicatorsByExternalIdPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new DeleteTiIndicatorsByExternalIdPostRequestBody();
$requestBody->setValue(['externalId-value1', 'externalId-value2', ]);
$result = $graphServiceClient->security()->tiIndicators()->deleteTiIndicatorsByExternalId()->post($requestBody)->wait();