permissions.php

См. документацию.

<?php
 
namespace Bitrix\Mail\Integration\Crm;
 
use Bitrix\Main\Loader;
use Bitrix\Crm\Service\Container;
 
class Permissions
{
    private static ?Permissions $instance = null;
    private bool $isCrmInstalled;
 
    public static function getInstance(): self
    {
        if (!isset(self::$instance))
        {
            self::$instance = new self;
        }
 
        return self::$instance;
    }
 
    public function hasAccessToCrm(): bool
    {
        return $this->isCrmInstalled && Container::getInstance()->getUserPermissions()->entityType()->canReadSomeItemsInCrm();
    }
 
    private function __construct()
    {
        $this->isCrmInstalled = Loader::includeModule('crm');
    }
}