.settings.php

См. документацию.

<?php
return [
    "controllers" => [
        "value" => [
            "defaultNamespace" => "\\Bitrix\\Sender\\UI\\Controller"
        ],
        'restIntegration' => [
            'enabled' => false,
        ],
        "readonly" => true,
    ],
    "yandex.integration.widget" => [
        "value" => [
            "partnerId" => 2706070
        ]
    ]
];