<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\TokenLifetimePolicy;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new TokenLifetimePolicy();
$requestBody->setDefinition(['{\"TokenLifetimePolicy\":{\"Version\":1,\"AccessTokenLifetime\":\"5:30:00\"}}', ]);
$requestBody->setDisplayName('Contoso token lifetime policy');
$requestBody->setIsOrganizationDefault(true);
$result = $graphServiceClient->policies()->tokenLifetimePolicies()->byTokenLifetimePolicyId('tokenLifetimePolicy-id')->patch($requestBody)->wait();