.settings.php

См. документацию.

<?php
 
use Bitrix\Mail\Integration\UI\EntitySelector\AddressBookProvider;
use Bitrix\Mail\Integration\UI\EntitySelector\MailCrmRecipientProvider;
use Bitrix\Mail\Integration\UI\EntitySelector\MailUserRecipientAppearanceFilter;
use Bitrix\Mail\Integration\UI\EntitySelector\MailCrmRecipientAppearanceFilter;
 
return array(
    'controllers' => array(
        'value' => array(
            'namespaces' => array(
                '\\Bitrix\\Mail\\Controller' => 'api',
            ),
            'defaultNamespace' => '\\Bitrix\\Mail\\Controller',
        ),
        'readonly' => true,
    ),
    'ui.selector' => [
        'value' => [
            'mail.selector'
        ],
        'readonly' => true,
    ],
    'ui.entity-selector' => [
        'value' => [
            'filters' => [
                [
                    'id' => 'mail.mailUserRecipientAppearanceFilter',
                    'entityId' => 'user',
                    'className' => MailUserRecipientAppearanceFilter::class,
                ],
                [
                    'id' => 'mail.mailCrmRecipientAppearanceFilter',
                    'entityId' => 'contact',
                    'className' => MailCrmRecipientAppearanceFilter::class,
                ],
                [
                    'id' => 'mail.mailCrmRecipientAppearanceFilter',
                    'entityId' => 'company',
                    'className' => MailCrmRecipientAppearanceFilter::class,
                ],
                [
                    'id' => 'mail.mailCrmRecipientAppearanceFilter',
                    'entityId' => 'lead',
                    'className' => MailCrmRecipientAppearanceFilter::class,
                ],
            ],
 
            'entities' => [
                [
                    'entityId' => 'address_book',
                    'provider' => [
                        'moduleId' => 'mail',
                        'className' => AddressBookProvider::class,
                    ],
                ],
                [
                    'entityId' => 'mail_crm_recipient',
                    'provider' => [
                        'moduleId' => 'mail',
                        'className' => MailCrmRecipientProvider::class,
                    ],
                ],
            ]
        ],
        'readonly' => true,
    ],
);