Oh, I notice I did get an email from Microsoft advising me that thunderbird now has access to the Microsoft account with that very email address. This is on the Windows 11 laptop that I set up for Oauth2 last night. And yeah, it does have access and works.

This all worked swell on that machine, the others, not so much.

If you had to enter the address manually in the OAuth window, it's probably because cookies aren't accepted. Cookies must be accepted in TB Settings, at least for the MS authorization site, for the OAuth process to complete.

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

OK, I don't see cookies in the account settings. Is tb using firefox? Do I have to unrestrict cookies, but where?

OK, I found cookies settings in tb. I added microsoft.com, office365.com, outlook.com and selected allowed.

No difference. the large window appears, does not populate and then disappears. No opportunity to do anything at all.

I think you need to allow for login.microsoftonline.com also. A non-MS antivirus could also be blocking, or a VPN if applicable. Less likely, but not uncommon, is if you're running a server app. Run Windows in safe mode to bypass startup apps like these.

I added login.microsoftonline.com to allow cookies. No difference. The box blinked and did not populate. I use the Microsoft AV and nothing unusual. I am stopped.

Cookies used to have nothing to do with email. Now we have more trouble than we used to have. Swell, huh?

Are you using the settings in the link in my first reply?

Yes. Or I think so. Or I tried them.

Right now I have pop-mail.outlook.com 995 I tried outlook.office365.com *which worked last night on the Windows 11 laptop.

SSL/TLS OAuth2

Use outlook.office365.com on 995 for POP or 993 for IMAP, SSL/TLS, OAuth2, and smtp.office365.com on 587, STARTTLS, OAuth2. User Name = email address.

Well, I no longer have an error. It asked for the authenticator number and now things are working, it seems. I sent myself test mail from another account to the hotmail account and the email arrived on the server https://outlook.live.com/mail/0/

But the test mail did not come to Thunderbird. Nor any other mail since 3/12/2024

I expected this to all resolve and I would get the missing mail. But even though the mail is on the server, it has not arrived with POP.

Is the Hotmail account IMAP on all devices, phones, laptops and desktops, or POP on some and IMAP on others? Check the Server Type in Account Settings.

Well, when I got up this morning there was a popup from microsoft on thunderbird, asking for my authenticator number. I gave it that, a couple of times, and now I have my email. It did make me reset my pw because it had failed too many times. outlook.office365.com on 995 for POP worked, even though I had tried it before.

Thanks for all your help. I have another location that has the same problem, I have to go through this when I get back there. This is being used on three computers right now.

If you have the same account on multiple devices, it's far simpler and more efficient to have them all IMAP instead of POP. But to switch from POP to IMAP, it's not sufficient to just change the server settings:

http://kb.mozillazine.org/Convert_a_POP_account_to_a_IMAP_account

I got back to my other location, windows 10. Same problem here. I changed my server settings to outlook.office365.com for pop on 995 SSL/TLS Oauth2 It says again, on the popup

Microsoft Sign in You can't sign in here with a personal account. Use your work or school account instead.

There is a passkey option that then asks me to insert my usb passkey, which I do not have.

You wouldn't get that error with a regular consumer hotmail or outlook.com account, but you would with an Office365 domain account or Exchange account. Depending on the domain, IMAP and SMTP would have to be enabled by the admin, or in the case of Exchange, an add-on like Owl would be needed to access the account in TB.

I have only a 25 or 30 yo hotmail account, from before Microsoft owned Hotmail. So I am getting this message.

outlook.office365.com on 995 for POP worked, even though I had tried it before, at the other computer. But not on this one.

Something changed during this process the last time, and it asked me for my google authenticator number, and then it started working. At this location, also Windows 10, this one has not worked yet.

OK, at the moment, outlook.office365.com on 995 for POP worked, even though I had tried it before. Does give a signin popup. If I put in my pw I get that error message about "You can't sign in here with a personal account."

If I click Sign in options at the bottom,

Sign-in options Face, fingerprint, PIN or security key Use your device to sign in with a passkey. Sign in to an organization Search for a company or an organization you're working with.

If I click the top I get a request again to insert my yubikey or other usb device which I do not have, and never did.

Clicking the ? next to that gives

Face, fingerprint, PIN or security key

It's easier and safer to sign in with passkeys. You can sign in using your face, fingerprint, PIN, or use another device like a phone or security key. No passwords, apps, or codes needed.

I have a phone and authenticator app all set up but it only wants a physical key. That is the problem here.

So I clicked to "Get back into your account" in the TB popup after changing the pw on the website which I had no trouble logging into. I guess I don't understand why this all does not work. I looked and clicked to get back into my account: I had entered my old hotmail email but it doesn't seem to like it.

Get back into your account

Who are you? To recover your account, begin by entering your email or username and the characters in the picture or audio below. Email or Username: * Example: user@contoso.onmicrosoft.com or user@contoso.com Microsoft Accounts or personal email addresses don’t work here. Make sure you enter your work or school account (e.g. user@contoso.com). If you want to reset a Microsoft Account password, click here.

Now having change my pw when i get back to my other location that will stop working again. Swell, huh?

This is not working. When I logged into the website it was locked because of too many pw attempts. After i cleared that TB still could not successfully check mail.