Windows 10: Cannot add security info into my Microsoft account or sign into any Office apps on a clean...

My Windows account and MS Office 365 subscription worked perfectly fine originally. Then, out of a sudden, I got signed out and cannot sign into any of my office apps, and there is a new message in Accounts -> Your Info: "You need to add security info to your Microsoft account". An attempt to sign in either the office apps or in 'Your info' prompts me to enter my account details, and then falls into a loop right after I enter everything. I managed to sign in with a newly created Microsoft account after a system reset, but still cannot use my main account with the subscription the one I am

:)

 

Signing into Onenote app converts local account to microsoft account

Steps:

• Sign into a local account
• Open the OneNote app (tablet not desktop app)
• Sign in to this app with a Microsoft account

The local account is then converted into a Microsoft account with that identity.

This is wrong and unexpected behaviour as no indication is given that the sign in is for the whole of windows rather than just OneNote.

It is also hard to revert.

I am guessing that other apps may exhibit the same behaviour.

In fact I don't understand how an app (which is supposed to be sandboxed and secure) can change user account information.

 

Cannot sign in microsoft account.

My device: Lumia 520. GDR2.
I cannot sign in my Microsoft account on my device. It didnt say any error but Microsoft account is not listed in Email and account list. When I click add button, it will show microsoft account option but after press sign in, it is still not shown in email
and account. Another problem is i cannot delete facebook account. Error code: 0x83cf1202. I have tried as suggested here: http://support.microsoft.com/kb/2475837/en-us#step0x83cf1202 but as my Microsoft account is not shown, I cannot do step 6.

Any suggestion?