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I have tried to change the account settings for my hotmail emails, but for STMP settings Oauth2 was not listed as an available option. Please advise. I am able to access hotmail emails on an Android tablet, but need to reset Thunderbird on my laptop.

Windows 8.1, Firefox 99.0.2, eMail program part of Microsoft Office365 (deployed by university IT department) Login process worked fine for a month or so after implementation of a 2-level authentication (password plus a second method of user's choice - I chose a USB-flash device which [on request] sends a code for 2nd verification). All of the above still works, except that once logged in, the system asks me if it should remember me, or not (i.e., store a cookie or not, for future convenience). I always click "No". Now, when I do that, I get an error number 500, which is completely non-committal: "Something Went Wrong" - with a long garbage code. (See attachment for sample.) Results of tests to see what's wrong: 1) works fine (able to complete eMail login) under Microsoft Edge; 2) works fine on my laptop, running Windows 8.1 and Firefox 94; 3) on the 'problem' computer (desktop), I uninstalled Firefox 99 and downloaded/installed Firefox 93 - "500" error persisted. Just today: removed Firefox/Mozilla (including all folders/files, and Registry entries) then re-installed version 99. Still doesn't work. Let me know what else you need to know.

All of a sudden, since yesterday, I cannot send any emails via TB since I upgraded to the 115-version. I've never experienced this before using TB.

Sending emails elsewhere from - by directly logging in to hotmail or from my phone - is no problem whatsoever.

But on TB115, when attempting to send a mail, an empty pop-up window appears with the headline "Enter credentials for (my emailaddress) on smtp.office365.com", before closing again. After a short while attempting to deliver the message, an error box reads: "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.office365.com timed out. Try again."

SMTP settings: Outlook.com (Microsoft) smtp.office365.com Port 587 STARTTLS OAuth2

Any solutions?

Hi Support team,

I am looking for an option to add a user's online archive mailbox to his Thunderbird client. I tried adding it as a separate account with "/archive/" as the IMAP directory, but that didn't work. Is there any option to get this done? Please help if any.

Thanks in advance, Pramod

While away from my computer for a few days, Thunderbird stopped retrieving new emails. I noticed this when I returned. I'm using imap to download from the server. Logging in to the server via browser shows that there indeed new emails. Quitting Thunderbird and restarting results in showing old emails and a spinner (slider?) on the Inbox tab that never stops. I have not changed configuration recently (I was away when this started). I followed a suggestion to delete cert9.db, key4.db, and logins.json. Doing this and restarting changed nothing. My understanding is that this should have deleted my server password information, but I was not prompted for a password on restart. I have uploaded a snapshot of the "Troubleshooting information" tab to pastebin:

https://pastebin.com/fsB64yiu