<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Users\UsersRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new UsersRequestBuilderGetRequestConfiguration();
$headers = [
'ConsistencyLevel' => 'eventual',
];
$requestConfiguration->headers = $headers;
$queryParameters = UsersRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->filter = "endswith(mail,'a@contoso.com')";
$queryParameters->orderby = ["userPrincipalName"];
$queryParameters->count = true;
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->users()->get($requestConfiguration)->wait();