Windows 10: Can't sign out of work account

I click 3 dots then Forget, it gives error "Couldn't sign out of this account." I try to sign out and it asks me to sign in with the 3rd-party authentication app my former client used, but I don't have access to that anymore. Also the former account shows on any Microsoft login view and behaves the same way.

:)

 

Creating or signing in to microsoft account

Hi Gloria,

The error code that your are getting when adding an account is usually caused by the following:

• Your phone has an incorrect date and time set.
• You do not have a data connection.
• Your phone is in a "bad state."

We suggest that you follow the steps on this link to set up your Microsoft
Account on your device.

Keep us posted for further assistance.

Regards.

 

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?

 

Can anyone tell me how to delete these accounts from GMail ?

I found links that look like what I have on my gmail account with the other gmail accounts added. There are pictures and explanations. How to Sign Out of Gmail: Step-By-Step Guide >> App Authority How to unlink an account you can't sign into - Gmail Community How to remove the Gmail account name from a listing - Quora