<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Groups\Item\ValidateProperties\ValidatePropertiesPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ValidatePropertiesPostRequestBody();
$requestBody->setDisplayName('Myprefix_test_mysuffix');
$requestBody->setMailNickname('Myprefix_test_mysuffix');
$requestBody->setOnBehalfOfUserId('onBehalfOfUserId-value');
$graphServiceClient->groups()->byGroupId('group-id')->validateProperties()->post($requestBody)->wait();