Znuny and ((OTRS)) Community Edition

i don't understand how to disable customer auth

as i understand , need to create something like: otrs.Console.pl Admin::CustomerUser::Add --user-name ... --first-name ... --last-name ... --email-address ... --customer-id ...
And then customers will have no access to otrs panel

how can i disable customer authentication?

Guys, how to properly implement the address book in OTRS? Specifically, it is of interest to choose a email in the TO, CC field, etc., but they should not have access to the OTRS panel itself as customers. Thank you.

Друзья, как правильно реализовать адресную книгу в ОТРС? Конкретно интересует возможность выбрать юзера в поле TO,CC и т.д., но к самому ОТРС у них доступа быть не должно. Благодарю!