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Thunderbird 115.6.1 won't let me add a Microsoft Office 365 e-mail account.

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  • Last reply by sfhowes

skip18
skip18
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The account works in Outlook and can be accessed via the Web portal but after attempting to setup the account, everything looks good until I hit Done then an error message comes up saying "Unable to log in at server. Probably wrong configuration, username or password." What is going on here. I've been able to use the same configuration in Outlook and two iOS applications.

The account works in Outlook and can be accessed via the Web portal but after attempting to setup the account, everything looks good until I hit Done then an error message comes up saying "Unable to log in at server. Probably wrong configuration, username or password." What is going on here. I've been able to use the same configuration in Outlook and two iOS applications.
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sfhowes
sfhowes
  • Top 10 Contributor
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The authentication method should be OAuth2.

https://support.mozilla.org/en-US/questions/1417298#answer-1588949