In my language: "kokoonpanoa ei voitu vahvistaa", assembly could not be validated. (finnish-english) I have before could used microsoft outlook e-mail in thunderbird but not anymore? There is in yellow box something about server and does not accept? Could it be because sometime ago i added two-step log-in to outlook? I have then used browser e-mail or microsoft windows e-mail but would like to get it back to thunderbird?