Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Cannot access Microsoft365 Outlook email through Thunderbird

  • 1 reply
  • 2 have this problem
  • 7 views
  • Last reply by techguy150

more options

We get our email through GoDaddy, hosted on Outlook. For years we have accessed this email through Thunderbird, but about a month ago we were kicked off and have not been able to sign-in or download any new emails through Thunderbird. We are able to sign onto Outlook through the browser with our passwords no problem, but using the same emails on Thunderbird gives us the attached error message. We have tried uninstalling and reinstalling without success.

We get our email through GoDaddy, hosted on Outlook. For years we have accessed this email through Thunderbird, but about a month ago we were kicked off and have not been able to sign-in or download any new emails through Thunderbird. We are able to sign onto Outlook through the browser with our passwords no problem, but using the same emails on Thunderbird gives us the attached error message. We have tried uninstalling and reinstalling without success.
Attached screenshots

All Replies (1)

more options

If you're unable to access your Microsoft 365 Outlook email through Thunderbird, it's possible that the email account is not set up correctly or that there are compatibility issues between Thunderbird and Microsoft 365. Here are some steps you can take to troubleshoot the problem:

Enable IMAP in your Microsoft 365 account: By default, Microsoft 365 Outlook uses the Exchange protocol, which is not natively supported by Thunderbird. However, you can enable IMAP access in your Microsoft 365 account settings. Sign in to your Microsoft 365 account through a web browser, go to the account settings or options, and enable IMAP. Make a note of the IMAP server settings provided by Microsoft.

Configure Thunderbird for Microsoft 365 Outlook using IMAP: Open Thunderbird and go to "Tools" (or "Options") > "Account Settings". Click on "Account Actions" and select "Add Mail Account". Enter your name, email address, and the password associated with your Microsoft 365 Outlook account. Click on "Continue". Thunderbird should automatically detect the server settings based on your email address. If not, choose "Manual config" and enter the IMAP server settings provided by Microsoft. Click on "Done" to complete the configuration.