Win10 Another User On This Devices Uses This Microsoft Account

64-bit PC running Windows 10 Home. We use Microsoft Family features so linking our User accounts to our Microsoft accounts is critical. My daughter had admin access and decided to circumvent the family limits but deleting her existing account and creating a local account not linked to her Microsoft account. I figured out what she had done when I noticed when her activity report showed zero activity for the week. She's been punished (our baseboards have never been cleaner) and I am now trying to straighten out the PC.

I deleted her errant local account. Created a new local account for myself with admin rights. Created a new local account for her set to Standard User. The issue I'm having is when I try to link the two new local accounts to their Microsoft accounts. For both accounts I get an error "Another user on this device uses this Microsoft account, so you can't add it here."

I've tried adjustments to Local Security Policy, I've removed 1 user (hers) from Group Policy Editor, I've removed the computer from our accounts on Microsoft.com. I've unlinked the device from the store. I've looked in Computer Management and found no additional users there. I've looked in PC properties > User Settings and found nothing there. There are no StoredIdentities in the Registry. I've even edited the Registry to remove all instances of the related email addresses. I'm at the end of my rope. Only thing I can think to do at this point is full wipe and reinstall of windows which I've very much like to avoid. Anyone have any suggestions?

 

I don't use the family features you are having trouble with so this reply is simply based on my generally sound understanding of how these things work. Any one user account runs either on a local account or on a Microsoft account. It cannot be both, so I suspect your attempt to link two local accounts to the Microsoft account is not possible by design and the user accounts need changing to Microsoft accounts. My 2p anyway.

 

To be clear, this is two distinct Local accounts I am trying to link to two distinct Microsoft accounts (Local account 1 linked to Microsoft account X, Local account 2 linked to Microsoft account Y).

This is the same procedure I follow whenever I create a new user. Create as Local (because I like having the custom user folder name and not the garbage the Microsoft account will give) and then link to Microsoft account. I've never had an issue doing so before.

 

Create new Microsoft accounts?