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Right then, about a week ago Thunderbird updated from 115.2.2 to 115.2.3.

I use TB to manage my Gmail, Hotmail and business emails. Has worked well, until this new update.

I began immediately receiving a pop-up regarding my Hotmail account. Sometimes the pop-up flashes for a few seconds, other times it stays on the screen.

https://login.microsoftonline.com/common/oauth2/v2.0/authorize?response_type=code&client_id=9e5f94bc-e8a4-4e73-b8be-63364c29d753&redirect_uri=https%3A%2F%2Flocalhost&scope=https%3A%2F%2Foutlook.office365.com%2FIMAP.AccessAsUser.All+https%3A%2F%2Foutlook.office365.com%2FPOP.AccessAsUser.All+https%3A%2F%2Foutlook.office365.com%2FSMTP.Send+offline_access&login_hint=XXXX%40hotmail.com

• The XXXX is my email name removed.

The pop-up is mostly blank except for a text box at the very top with a long string of characters. Above that it states, 'Enter credentials for XXXX@hotmail.com at Outlook.Office365.com'. I can't figure out if it wants me to enter the string of characters somewhere on Outlook or if I am supposed to copy something from Outlook and paste it into the text box. Moreover, I cannot seem to find anything online to assist.

The problem is emails from Outlook are not downloading to TB. My last downloaded email was on 11.09.23 and there are new messages in my Outlook.

Ideas?

Thunderbird stopped communicating with homtail after upgrading to v 115.0 I can send emails using smtp-mail.outlook.com but it fails to retrieve messages from outlook.office365.com There's no error message, it simply fails to connect. (A pop-up window may appear for a few seconds, then it closes, with no new messages downloaded and no errors shown) I'm using the POP setting. Tried to recreate the account as IMAP - it just shows "checking password", would not proceed any further. (No error message, no timeouts. I tried to enter incorrect password on purpose - still no error message, apparently they don't even connect.) Disabling firewall doesn't help. EVERYTHING WORKED FINE BEFORE THE UPGRADE! PLEASE BRING BACK THE WAY IT WAS!!!

I have several Outlook.com e-mail addresses in TB 115. Every time I start TB, I get the popup window to send a notification to my Microsoft Authenticator mobile app and authenticate the access. I get the popup for each account I have.

This happened when i installed v115 over the previous version. I still get the authentication popups after deleting my profile and re-entering my accounts from scratch.

All of my outlook.com accounts are passwordless and no longer have an app password associated with them.

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

Using IMAP to outlook.office365.com and I've stopped getting new mail. I can send mail but not receive. It just times out after a couple of minutes. Any help is appreciated. Settings match microsoft's server names etc. Steve