PHP で Exchange メールボックス自動転送機能を開発するための実践的なガイド

{
  "require": {
    "guzzlehttp/guzzle": "^7.0",
    "guzzlehttp/psr7": "^2.0",
    "microsoft/ews": "^3.3"
  }
}

<?php

require 'vendor/autoload.php';

use GuzzleHttpClient as GuzzleClient;
use GuzzleHttpExceptionGuzzleException;
use GuzzleHttpHandlerCurlHandler;
use GuzzleHttpHandlerStack;
use GuzzleHttpPsr7Request;
use MicrosoftExchangeWebServicesClient;
use MicrosoftExchangeWebServicesDataAutodiscoverRedirectionUrlValidationCallback;
use MicrosoftExchangeWebServicesDataFolderId;
use MicrosoftExchangeWebServicesDataMessageBody;
use MicrosoftExchangeWebServicesDataSendInvitationsMode;
use MicrosoftExchangeWebServicesDataSetUserOofSettingsRequest;
use MicrosoftExchangeWebServicesDataUserOofSettings;

function createExchangeClient($username, $password)
{
    $handler = new CurlHandler();
    $stack = HandlerStack::create($handler);

    $guzzleClient = new GuzzleClient([
        'handler' => $stack,
        'auth' => [$username, $password],
        'verify' => false,
    ]);

    $callback = new AutodiscoverRedirectionUrlValidationCallback(function ($url) {
        return true;
    });

    $exchangeClient = new Client($guzzleClient);
    $exchangeClient->setCallback($callback);

    return $exchangeClient;
}

function autoForwardEmail($client, $emailAddress, $forwardAddress)
{
    $folder = new FolderId(FolderId::ROOT);
    $userSetting = new UserOofSettings(UserOofSettings::ALLOW); 
    $userSetting->ExternalAudience = UserOofSettings::ALL;
    $userSetting->InternalReply = new MessageBody("Auto forward enabled");
    $userSetting->ExternalReply = new MessageBody("Auto forward enabled");
    $userSetting->EnableExternalOofOptions = true;
    $userSetting->AllowExternalOofOptions = true;
    $userSetting->ForwardingEnabled = true;
    $userSetting->ForwardingSMTPAddress = $forwardAddress;
    $userSetting->SendOofMessageToOriginator = false;
    $userSetting->AutoForwardReply = false;

    $request = new SetUserOofSettingsRequest($emailAddress, $userSetting);
    $request->AddAdditionalProperties('ReplyBody', 'LastExternalOofResponse');

    return $client->SetUserOofSettings($request);
}

$username = 'your_username';
$password = 'your_password';
$emailAddress = 'your_email_address';
$forwardAddress = 'forward_to_email_address';

$client = createExchangeClient($username, $password);
$result = autoForwardEmail($client, $emailAddress, $forwardAddress);

var_dump($result->HttpStatus);