default_option.php

См. документацию.

<?php
$im_default_option = array(
    'notify_flash_engine_type' => 'cache',
    'general_chat_id' => 0,
    'general_chat_message_join' => true,
    'general_chat_message_leave' => false,
    'allow_send_to_general_chat_all' => 'Y',
    'allow_send_to_general_chat_rights' => 'AU',
    'call_server' => 'N',
    'call_server_enabled' => true,
    'call_server_max_users' => 100,
    'open_chat_enable' => IsModuleInstalled('intranet')? true: false,
    'color_enable' => true,
    'correct_text' => false,
    'view_offline' => true,
    'view_group' => true,
    'send_by_enter' => true,
    'panel_position_horizontal' => 'right',
    'panel_position_vertical' => 'bottom',
    'load_last_message' => true,
    'load_last_notify' => true,
    'privacy_message' => 'all',
    'privacy_chat' => IsModuleInstalled('intranet')? 'all': 'contact',
    'privacy_call' => IsModuleInstalled('intranet')? 'all': 'contact',
    'start_chat_message' => IsModuleInstalled('intranet')? 'last': 'first',
    'privacy_search' => 'all',
    'privacy_profile' => 'all',
    'chat_extend_show_history' => true,
    'disk_storage_id' => 0,
    'disk_folder_avatar_id' => 0,
    'contact_list_birthday' => 'all',
    'contact_list_load' => true,
    'contact_list_show_all_bus' => false,
    'path_to_user_profile' => (!IsModuleInstalled("intranet") ? '/club/user/#user_id#/' : ''),
    'message_history_index' => false,
    'call_log_service' => '',
    'call_log_secret' => '',
    'call_server_url' => '',
);
 
if (file_exists($_SERVER["DOCUMENT_ROOT"]."/bitrix/php_interface/im_options.php"))
{
    $additionalOptions = include($_SERVER["DOCUMENT_ROOT"]."/bitrix/php_interface/im_options.php");
    if (is_array($additionalOptions))
    {
        $im_default_option = array_merge($im_default_option, $additionalOptions);
    }
}