<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\DirectoryObjects\ValidateProperties\ValidatePropertiesPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ValidatePropertiesPostRequestBody();
$requestBody->setEntityType('Group');
$requestBody->setDisplayName('test');
$requestBody->setMailNickname('test');
$requestBody->setOnBehalfOfUserId('onBehalfOfUserId-value');
$graphServiceClient->directoryObjects()->validateProperties()->post($requestBody)->wait();