Okay, it appears that Microsoft is discontinuing support for basic auth with Microsoft 365 services starting sometime around June 6th 2023. (And you might need specialized help with your mail and with your IT more generally here, as this isn’t a configuration sequence or a mail server I have a way to test.)
That written, read this: https://techcommunity.microsoft.com/t5/exchange-team-blog/microsoft-and-apple-working-together-to-improve-exchange-online/ba-p/3513846
Then update to macOS 12.6.6 or macOS 13.4.
Then remove and re-add the mail account, not with basic auth, and test again.
If not, remove and re-add it as an Exchange account.
Longer answer, more links…
Louis XIV wrote:
It's my understanding that Microsoft no longer supports Apple Mail? (Version 15.0). Can someone verify this? I have multiple business accounts through GoDaddy and I can no longer log into any Exchange mail account. (Not a GoDaddy issue). This also includes the actual Exchange site for each account. It's obviously an authorization issue and I believe it related to Microsoft no longer accepting simple verification when someone tries to long in.
Yes, I have tried to change passwords, etc. It's obviously an Exchange issue of not accepting passwords.
Using Apple 12.2.
First… macOS 12.2? That’s pretty old. Definitely update that.
If you want to use Microsoft services and servers and particularly Exchange Server, using Windows is usually the best approach. If not that path here, then using Office and Outlook would be common. GoDaddy has occasionally been able to figure out some odd behaviors of their own servers, so they too could have issues in play here.
It appears Microsoft is dropping basic auth for IMAP and POP for their Microsoft 365 services, and requiring everybody to move over over to multi-factor or to Exchange:
https://support.microsoft.com/en-us/office/set-up-email-in-mac-os-x-mail-de372dc4-9648-4044-a76c-e8a60e178d54
The following text was purportedly sent out by GoDaddy to their customers:
Update your settings to keep your email app access working.
There are email accounts in your organization using Basic Authentication, which Microsoft will no longer support after 06/08/2023. You'll still be able to access your email through your browser, but not from an email app, such as Outlook or Apple Mail — don't worry, none of your emails will be lost.
In order to continue using your email apps, you need to update your settings from POP/IMAP to Exchange for each device you use to check your email. This also applies to other users who are set up within your account using POP/IMAP settings. Here's how to update your email settings.
Here is how to set up Apple Mail with Exchange protocols for Microsoft 365 on GoDaddy:
https://productivity.godaddy.com/app/exchangeSettingsHelpArticles?type=basicauthupdate#/
macOS mail does support OAuth and multi-factor, and re-configuring or removing and re-adding the server account connection not using basic auth should be enough to enable that. (I’ve been not using basic auth for a while. It works. Though I’m not working with Microsoft 365 or Exchange.)
Another bigger-project option is IMAPSYNC or similar, and re-hosting all your mail over to another service and another provider. (At least while IMAP with basic auth is still working.)
