<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Security\Incidents\MicrosoftGraphSecurityMergeIncidents\MergeIncidentsPostRequestBody;
use Microsoft\Graph\Beta\Generated\Models\Security\CorrelationReason;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new MergeIncidentsPostRequestBody();
$requestBody->setIncidentIds(['2972395', '2972396', ]);
$requestBody->setIncidentComment('Merging related incidents from the same campaign');
$requestBody->setMergeReasons(new CorrelationReason('sameCampaign, sameActor'));
$result = $graphServiceClient->security()->incidents()->microsoftGraphSecurityMergeIncidents()->post($requestBody)->wait();