Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Trouble with set up - "Login in to account "Microsoft 365" Failed. Login in to server smtp.365.com with user name x failed."

  • 1 reply
  • 2 have this problem
  • 53 views
  • Last reply by christ1

michaelwhuebner
michaelwhuebner
more options

I am trying to move all my emails over from outlook/office, but have continued to get error messages. I have tried various trouble shooting that are recommended. when i try to send a test message it tells me Login in to account "Microsoft 365" Failed. Login in to server smtp.365.com with user name x failed. Is there an easy way to fix this

I am trying to move all my emails over from outlook/office, but have continued to get error messages. I have tried various trouble shooting that are recommended. when i try to send a test message it tells me Login in to account "Microsoft 365" Failed. Login in to server smtp.365.com with user name x failed. Is there an easy way to fix this

Modified by Wayne Mery

All Replies (1)

christ1
christ1
  • Top 25 Contributor
  • Moderator
more options

Please post your Troubleshooting Information. At the top right of the Thunderbird window, click the menu button ≡, then select Help > Troubleshooting Information. Press the "Copy text to clipboard button" and paste the information into your reply.

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.