Outlook 2016 doesn't accept password or app password

As I've pointed out several times, I've added the account with auto-discovery. I did try other methods, like EAS, but it was firstly tried with auto-discovery which had this issue. Your insistence also brings out more questions- are you saying EAS for consumer accounts is not supported with latest Outlook, even with OAuth support? You should know that the add account function entry screen is for auto-discovery and one has to override it to get to manual setup, so several of my attempts were done by auto-discovery for the simple fact of exploring what works.

As far as IMAP/SMTP and other protocol proxies build into the "New Outlook," accessing, downloading, storing/caching, aggregating non-Microsoft 3rd-party platform data is concerned, most folks would not take assurance from Microsoft representatives of these facts at face value. You, as an employee/representative, are subjective to misunderstanding/miscommunication/misinterpretation of details like most human would in these circumstances. Case in point, just a matter of days ago, you shared information to use regkey to add OAuth support for older Outlooks but only to later reverse that recommendation. My privacy concern is less about someone can hack into the Microsoft account or not. It is more about Microsoft having access to my other data which you would not have otherwise. Outlook and Mail apps are doing that fine right now without using cloud proxies, so it's difficult to understand the justification. In addition, the updated terms and conditions indicate Microsoft would make use of that data, which makes your stance contradictive. The "New Outlook" is new and so is its proxy approach. Regulatory scrutiny doesn't usually come at the onset because lack of data and impact. EU's regulation on data access, retention and utilization are strict, so I rather hear their assessment instead of Microsoft directly. According to several studies, security researchers found 3rd-party account credential given to "New Outlook" was stored and transmitted in plain test. If these other platform operates similar to Microsoft, that credential is the key to the user's entire account. Needless to stay, consumers have the right to be doubtful or critical of these privacy concerns.

@Gabriel

I spent the evening redoing my devices, so I can put some finality to this issue. On my Android phone, I cleared data and uninstall Outlook for Android. Removed ALL my accounts, i.e., work, personal Gmail and MS Hotmail from Gmail and the device itself.. Cleared cache and data for Gmail client.

When I add an account using Gmail's add function, which seems to activating a module probably co-developed with Microsoft because it has your logo and trademark. The add process is done by auto-discovery. The add process was successful and it only added an IMAP account, so there IS NO additional protocoled accounts for contact and calendar sync. I've did this multiple times and it's VERY clear the auto-discovery will add Hotmail as IMAP, which is not what I want.

When I attempt to add as an Exchange account manually, error message is saying server cannot be reached. I tried this on multiple Android devices, of version 12, 13 and 14, and they have the same behavior. IMAP is not going to serve my needs as I need calendar sync, so I will go back to use Exchange or EAS. Can you provide the correct server address, port number and security options for such configuration? If there is an updated article, please point me to it.

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.

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.

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.