<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\DirectorySetting;
use Microsoft\Graph\Beta\Generated\Models\SettingValue;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new DirectorySetting();
$valuesSettingValue1 = new SettingValue();
$valuesSettingValue1->setName('CustomBlockedWordsList');
$valuesSettingValue1->setValue('Contoso');
$valuesArray []= $valuesSettingValue1;
$requestBody->setValues($valuesArray);
$result = $graphServiceClient->settings()->byDirectorySettingId('directorySetting-id')->patch($requestBody)->wait();