Outlook 2016 doesn't accept password or app password

I had App Password when the problem occurred. I was able to get to my account via Web login. So, the password is the right one. I suspected a problem with App Password and I disabled Double Factor Identification. With that move, I was able to access the account through Outlook 2016, but got asked for a password frequently. This happened intermittently, not at the frequency set for Send/Receive.

I then deleted the account in Outlook 2016, then reconnected. Imap was still intermittent. I received mail and the mail folders got synchronized. BUT, no synchronization for both calendar and address lists.

At this point, I am waiting for Microsoft to resolve their server problem.

And why is this hit or miss (intermittent)? I can go for periods in a day, where it's working and then out of the blue, it's gone.

And why is this hit or miss (intermittent)? I can go for periods in a day, where it's working and then out of the blue, it's gone.

That's not surprising especially if there is a scramble to reroute resources, recover servers or otherwise triage the system. Previous references to the type of authentication and encryption and the fact that Microsoft is coincidentally(?) making changes to the Outlook ecosystem this month leave me concerned that this is a proprietary grab which Microsoft accidentally let out of the bag too early, wherein they plan to force people to use only proprietary products in which configurations cannot be changed or even reviewed as is the case with the Outlook android app.

Report at Down Detector by clicking on "Outlook" here:

https://downdetector.com/status/microsoft-365/

Outlook is MS's product, so they can do with it what they please. With so many users utilizing a robust email server that not only includes email syncing, but calendar, tasks, notes, etc. it make me wonder why MS has not come up with as robust a product, or purchased one of the existing products. Yes, MS offers Outlook and not the .com one, which is in fact a very robust email server for the desk top. Today, we're much more mobile, and the Outlook app for mobile leaves SO MUCH to be desired. If they took their desktop product and made it mobile, they'd probably be able to garner a good share of the market. Whether you like MS or not, we're left with this ecosystem that forces us (and I currently love my 9Folders email for android) to use third party apps, which then, due to MS, have all these issues.