Windows 10: Sign in with my Work account says 'That Microsoft account doesn't exists'

My account is currently local in Windows 11.I want to sign in with my Microsoft Account , but see the message below:With this e-mail address I am administrator in my organisation, owning the domain, and there is an assigned and a Microsoft 365 Business Standard is assigned to it.Also in my e-mail account it says this e-mail addres is a Work of School account:I am global admin in my organisation:So I cannot understand why Microsoft says this account is not a Microsoft account.

:)

 

Sign in with a Microsoft account instead

I do in fact have an existing Microsoft account and if I go directly to Microsoft, everything works. The problem is clearly at Step 7 of the process of, "Sign in with a Microsoft account instead." I don't know why this is happening.

 

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?

 

Strange Windows 10 User Account issue.

Unfortunately I had done those steps numerous reboots, it just, reappears for no good reason. The base account isn't even a Microsoft account, it's a local account.

I haven't quite tried the built in administrator account on W10, but so far in my experience on my own computer, the built in account seemed to have absolutely no more control than I did on my own.

It's just strange, I go in, it warns me twice about deleting the account, then it's gone. Reboot, and it's back?

EDIT: Just to specify, both command line and Netplwiz both say only HIS account exists on the computer, it doesn't list this rogue account. This is what I meant in my first post about the fact that even Windows doesn't seem to believe it exists, HALF the time. *Frown