Outlook 2016 doesn't accept password or app password

Frubbl -

1. OAuth is supported for EAS on outlook.com. I can confirm that it does work, as this is what Apple uses when they setup a new sync with their Mail app on Mobile. While the service support OAuth, the particular client that you are using also needs to be able to authenticate using that form of modern auth. So it is likely that if you have an older version of a client it may not support OAuth.
2. Yes as mention in #1, I can confirm that we support this and there are clients that are using it.
3. In app support is what I would recommend for any particular issues.

I am really disappointed about the communication of Microsoft. No answers, no new infos. All is dead. At the moment, I have two things not being clearly communicated:

1. EAS seems to be an obsolete protocol aswell as it has no oauth2 support. There is no statement from microsoft that this is true or not.
2. Calendar Subscriptions (add internet Calendar) are not working for outlook.com Mail Accounts. I have added an internet calendar (ical) which should be updated every 3 hours according to Microsoft documentation. But in fact, its not. It works like an imported calendar file...There is no official statement from microsoft about this issue aswell.

And: With the outlook for android app I even cannot add a internet calendar.

I am a paying customer and are able to contact the support. I only got the answer that all is OK with my account, it has to be the provider of the internet calendar, so the third party.

So Support is useless, we will get no information and I cannot talk to a microsoft employee. The real bad thing is that I have swiched with my E-Mail Accounts to outlook.com because I thought that Microsoft is a long term business...turns out that this was the wrong decision.

Again the following questions:

1. Will there be a way for third party apps to access data via a OAUTH2 compatible protocol like EAS was/is for basic auth?
2. Is EAS OAUTH2 compatible for consumer Accounts?
3. Is there any way to contact a microsoft employee to help with technical questions (I do not mean the 1st level support since they really cannot help me).

By the way, the automatic translation system when contacting the support is a real disaster. Is there any way to speak to native english or german employees?

The only thing consistent about this issue is the inconsistency of the connection reliability. I've given up on Microsoft. I toyed with the idea of running Outlook for Android just for my MSA (Microsoft Accounts). But I noticed in order to get my contacts to show up in the phone dialer, I have to enable Contact syncs to device's Contact storage, which allowed a 2-way access. Similarly, Calendar is the same way. Unless you contain everything you do to within Outlook for Android, it's unavoidable to allow Outlook some 2-way access to the device's other information.

In the end, I decided to move 90% of data off Microsoft Accounts. I hate to say this, I rather let Google have my calendar and contact data than Microsoft. Google provides more values to me in exchange for similar access. Microsoft has demonstrated zero care for consumer privacy and the willingness to do whatever it takes to scrape user data. It's too much for me and I hope both EU and US governments would come in and slap them silly at some point in the future.

Such a random affair: two of my four exchange accounts stopped working this morning in Outlook 2013. The other two are fine. Bizarre!

Interesting sort of workaround... if you open outlook.com in your browser and log in, Outlook 2013 will stay connected and let you use it for your hotmail account...

That's a bit of a red herring. It's like slamming a car door a hundred times to see if the door will lock. The "chance connections" you are getting are not full connections. Microsoft has been crystal clear that, if you get connection now, you will eventually not get a connection as they are phasing out exchange server connection authentication that is not the newer OAuth or OAuth2. Since they have disabled the ability of Outlook 2013/2016 to update that authentication in Exchange servers, even registry hacks get re-written by Microsoft "security updates", or superseded by new keys in the registry.

Eventually they will force obsolescence of your POP and IMAP servers, supposedly to prevent hacking of your accounts. However, by people trying to keep repeatedly signing in to the exchange servers, they are unwittingly helping Microsoft with their efforts to prove how insecure they are and why all authentication should be updated. Because, IF you DO connect, you are helping Microsoft prove how hackers can log onto your servers if they try it enough times.

The really stupid thing is they could have, and should have updated this security without forcing everyone to use their servers and services. This will eventually be seen for the transparent money grab that it is, and, as I keep saying, I will be waiting for the inevitable class action.

In the meantime, be forewarned that POP and IMAP are both headed for obsolescence on Microsoft platforms. How soon? Nobody knows for sure. They've been talking about it for 3 or 4 years now. But rest assured, they will be happy to sell you cloud storage, not to mention regressive subscriptions. And those subscriptions will rescue you from the ignominy of controlling and organizing your own data on your own storage as, of course, it is better to pay for cloud storage.