Outlook 2016 doesn't accept password or app password

I too have been struggling with this mess since MS created it. Unable to use EAS to sync contacts and calendar for my legacy Hotmail account to my Thunderbird 102 build with TBsync. Other accounts connect using Oauth2 without issue, but the Hotmail account would not accept app passwords or regular password.

I've tried a variety of server options including "eas.outlook.com" and "m.hotmail.com." Both have worked in the past before MS f***ed us in late January.

Today, I tried "m.outlook.com" as a server...and it worked. Or I should say, it's not yet been throwing password prompts. I can't advise on ports as TBsync doesn't provide for that setting. But give m.outlook.com a try and see if you have the same success as I have. And please let me know.

P.S. I'm using an app password to connect this account.

I even tested on a few devices that has never seen my account or Outlook for Android. This suggest it's not a "cache" issue with wrong settings or provision data or whatever.

Again, you recommended use auto-discovery, which created the account as IMAP. Another poster above me seem to echo the same experience. Since IMAP does not support calendar, it's a no go for me. I am merely asking for the correct server address, port and security setting for EAS or full on Exchange that Hotmail/MSN/Live/Outlook.com consumer email users should use. I have tried eas.outlook.com, m.outlook.com, outlook.office365.com, and all got responses that it cannot connect to server.

The auto-discovery method to add my work account does create an Exchange based account. This suggest your backend either didn't respond to the @hotmail.com address user ID, or the @hotmail.com address resolved as not supporting EAS or Exchange protocol, which contradicts all the comments recently. At least up to recently, these protocols are supported. Now, I can't differentiate between 1) if the support is removed; or 2) another set of server issues you are not aware of yet.

Much like @MissMcQueen indicated, I had zero working EAS connection on my mobile device yesterday. The previous working EAS account did not connect at all yesterday.

This page says to Switch to Outlook.com/Exchange Syncing but this is how all my outlook accounts were connected (via Outlook 2013). Yesterday I couldn't get into one of my accounts because of the CONSTANT credentials pop up so I deleted it & re-added it. It wouldn't open so I had to delete & re-add it again today & it is automatically connecting via IMAP - which the guidance says to avoid.
Honestly, this is so frustrating & I do feel Microsoft have created this problem to force people into either paying stupid money or downloading the privacy nightmare that is new Outlook.

AnotherBug,

I apologize for the frustration. Since you are having the issue with Outlook for Android, please submit an In App ticket. The link to do this is at the top of this article relating to the setup, Set up email in the Outlook for Android app - Microsoft Support. Did you add the account as IMAP before? I'm speculating but I wonder if Outlook for Android is caching the prior connection settings. Please update if In App support is able to help identify the issue.

I switched to Mozilla Thunderbird. Works fine. Don't abuse system resources. Works with all accounts together. On my MS Office 2013/2016 i backed up outlook files just in case and removed outlook altogether. There is no point in having it. Rest of Office working fine. Security with external links and attachments is there. It all cool. But so far having 3d party mail client is way better solution. In the end none of the MS Office outlooks worked with Microsoft e-mail accounts for about a month. Web interface is not optimal and forcing you to open spam mail in order to move it to spam folder.