Outlook 2016 doesn't accept password or app password

I filed this feature request, let's all vote on it and hopefully encourage microsoft to give us greater flexibility in our chosen email clients:

https://feedbackportal.microsoft.com/feedback/idea/c36fe0e4-6ed3-ee11-92bd-000d3a7a5824

this is relevant to the person that was using BlackBerry Hub+

Thanks for the break out. Let me go line by line.

Mobile - Outlook for Android - This syncs with its own separate API and looking at service telemetry and broad experiences you should be experiencing things well here. Again I would remove and readd the account. Don't try to manually force a protocol just let it set itself up naturally and it should set the proper config and be mondern auth/OAuth.

Personal - Outlook 2013 - OAuth is not supported, and setting registry keys likely can cause other impacts. I would recommend not doing that for this client. If you continue to use this client, you will need to stick with Basic Auth and as mentioend you likely will see an increased level of auth promptness.

Work - 2308 / 16731 - This is our Semi Annual Channel and this should be working just fine and if autoconfigured be properly setup. Gabe likely can assist a bit more here, or better yet would likely be to open an in app support ticket so that the support team can check config for the account in the logs.

For the other clients that you listed, Thunderbird recently just made a chance with how they setup the client. I personally have been communicating with their engineering team and we have discussed changes that were needed in their autoconfig service. They rolled out recently. The instructions that were also in the known issue shows the steps if you want to manually config. I can confirm that I have also had issues previously but when switched to OAuth my experience has been solid.

Thanks David for your answers as you are the only person from Microsoft that does it and for sure this is more than needed.

The problem is that nowadays I have different Outlook clients (desktop + mobile) that are not anymore able to sync with my Microsoft accounts (Hotmail and Outlook) due to this OAuth activation. This means that since that date, all my emails, calendar entries and contacts are not anymore updated in those clients and this has created a lot of confusion in my daily life (I had some critical calendar entries that are not anymore synchronized in all my devices, so this made me lose some important appointments).

Furthermore, this is even more painful because in my case, those software clients cannot be upgraded to support OAuth, and for this reason it is really a shame that Microsoft has done a so drastic change without informing us previously, in order to have had enough time to look for some alternative solution.

With so many impacted customers, it would have been better to allow us to decide if we do want to enable OAuth in our Microsoft accounts meanwhile we upgrade our clients or we look for some alternative solution. Unfortunately, Microsoft has activated this OAuth by force to our accounts and it seems that we cannot roll back to the Basic authentication (I just looked some way to disable it but there is no option at all to do it).

Is it really not possible to disable temporally this OAuth feature in our impacted Microsoft accounts?

Mobile - latest Outlook for Android, and latest Gmail for Android,

Personal - Outlook 2013 with latest updates all installed and OAuth regkey added

Work - latest Outlook that is a part of M365 as of this comment, build 2308 / 16731. I attempted this but was getting constant prompts, so much so that it was disrupting my work flow, so I removed the account from my work Outlook.

Not installed any more but have attempted in the last several weeks:

Thunderbird for Windows

Latest Outlook for iOS

Gmail, not a single issue over the same 4 weeks, even over my work travel.

As far as account setup is, I've tried to the 3 methods:

1. Use Microsoft Exchange type if it's explicitly listed, if not, then
2. Outlook.com type if it's listed; and
3. Auto discovery based on email address if the other 2 fails.

I did start removing my Hotmail/MSN/Live mail accounts from my devices - because the constant pop and associated alert tone was driving me nuts!

What version of Outlook are you running against? What I can confirm is that OAuth is only supported for Outlook.com in the versions that I mentioned in the latest known issue post. While OAuth bits and registry keys may have been in earlier versions, that does not mean it is supported for all account types. The official supported versions for Outlook.com is indeed what is listed in the known issues.