mobile_oauth.php

См. документацию.

<?php
 
use Bitrix\Mail\MailServicesTable;
use Bitrix\Main\Loader;
 
define('NOT_CHECK_PERMISSIONS', true);
 
require_once($_SERVER['DOCUMENT_ROOT'].'/bitrix/modules/main/include/prolog_before.php');
 
if (Loader::includeModule('mail'))
{
    if (isset($_REQUEST['serviceName']))
    {
        $_SESSION["MOBILE_OAUTH"] = true;
 
        $oauthHelper = MailServicesTable::getOAuthHelper([
            'NAME' => $_REQUEST['serviceName']
        ]);
        if ($oauthHelper && $url = $oauthHelper->getUrl())
        {
            LocalRedirect($url, true);
        }
    }
    else
    {
        header('Location: bitrix24://');
    }
}
 
require_once($_SERVER['DOCUMENT_ROOT'].'/bitrix/modules/main/include/epilog_after.php');