Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Pesquisar no site de suporte

Evite golpes de suporte. Nunca pedimos que você ligue ou envie uma mensagem de texto para um número de telefone, ou compartilhe informações pessoais. Denuncie atividades suspeitas usando a opção “Denunciar abuso”.

Saiba mais

Esta discussão foi encerrada. Faça uma nova pergunta se precisa de ajuda.

Authentican failure, ad infinatum

  • 2 respostas
  • 1 tem este problema
  • 251 visualizações
  • Última resposta de SuMo Bot
  • Resolvidas

SuMo Bot
SuMo Bot

Have no idea to whom I was chatting a week or so ago, but outlook.office365.com was recommended to me as the incoming server setting for Outlook.com. Set TB that way and used it for a week or so. TODAY got a "failure to authenticate" error from TB (have had many such errors before). Went directly to Copilot, as I thought it would be the most authoritarian place to clear up Microsoft problems. It provided the informaiton below: Official Outlook.com Thunderbird Incoming Server Settings (2026) IMAP (recommended) Settings Server name: imap-mail.outlook.com Port: 993 Security: SSL/TLS Authentication; OAuth2 Username; Your full Outlook.com email address

Why this is the correct server Outlook.com, Hotmail, Live, and MSN accounts do not use outlook.office365.com .

Set outlook account incoming server to imap-mail.outlook.com and reset TB Immediately got: Mozilla Thunderbird Thunderbird Authentication failure while connecting to server imap-mail.outlook.com.

Can someone please tell what's going on?

Have no idea to whom I was chatting a week or so ago, but outlook.office365.com was recommended to me as the incoming server setting for Outlook.com. Set TB that way and used it for a week or so. TODAY got a "failure to authenticate" error from TB (have had many such errors before). Went directly to Copilot, as I thought it would be the most authoritarian place to clear up Microsoft problems. It provided the informaiton below: Official Outlook.com Thunderbird Incoming '''Server Settings (2026)''' IMAP (recommended) Settings Server name: imap-mail.outlook.com Port: 993 Security: SSL/TLS Authentication; OAuth2 Username; Your full Outlook.com email address Why this is the correct server Outlook.com, Hotmail, Live, and MSN accounts do not use outlook.office365.com . Set outlook account incoming server to imap-mail.outlook.com and reset TB Immediately got: Mozilla Thunderbird Thunderbird Authentication failure while connecting to server imap-mail.outlook.com. Can someone please tell what's going on?

Solução escolhida

Possibly due to service outage https://downdetector.com/status/outlook/

Ler esta resposta 👍 0

Todas as respostas (3)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor

Solução escolhida

Possibly due to service outage https://downdetector.com/status/outlook/

SuMo Bot
SuMo Bot Autor da pergunta

Evidently, there IS an Outlook.com outage 11:00a to present. Thanks

SuMo Bot
SuMo Bot Autor da pergunta

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.