Hi, thank you for the explanations and screenshots on specops. We updated the 365 Admin Center setting so that the user is being asked to update the password, but still emails cannot be sent from Thunderbird connected to Exchange account. The server details are correct, we know that because some users are able to send emails from TBird with Exchange account added. We used for everyone outlook.office365.com, OAuth2, SSL at incoming and STARTLS at receiving. The first prompt is: Login to server ... with username... failed. If we select enter new password it doesn't work and when we select cancel then: Unable to authenticate to Outgoing server SMPT. Please check the password and verify the Authentication Method. Thank you for any guidance.
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Nov 22, 2024 8:31 am
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Nov 22, 2024 12:59 pm
Onur,
Thanks for joining the forums and posting your question. Just as a quick sanity check, can this specific user login using OWA directly in Exchange Online? In other words, it would be good to narrow in that the issue is specific with Thunderbird.
Are there any flags set for this user such as change password at next login? Also, make sure on certain things like the user's account is not locked out, etc.
You can use a quick little powershell snippet to check the user's properties:
get-aduser -identity username -properties * | select accountexpirationdate, accountexpires, accountlockouttime, badlogoncount, padpwdcount, lastbadpasswordattempt, lastlogondate, lockedout, passwordexpired, passwordlastset, pwdlastset | format-list
Hopefully some of these quick checks will help uncover the underlying issue. Let me know what you find.