How to Block Users from Logging Into Windows with Microsoft Account?

Question

I have users who "accidently" sign into Microsoft accounts, sometimes not even their account, with Windows 11. Then everything gets messed up.

How do I block them from doing this?

I tried this Group Policy setting.

Computer Configuration > Windows Settings > Security Settings > Local Polices > Security Options

I set Accounts: Block Microsoft accounts to Users can’t add or log on with Microsoft accounts.

Yet, I go into Settings, Account, and there is the Microsoft sign in. FAIL.

then I tried the Registry Editor.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Added key NoConnectedUser. Set value = 3. FAIL.

Then I tried adding another Registry entry.

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\default\Settings\AllowYourAccount

Changed the key Value from 1 to 0. FAIL.

I am out of ideas. Please help.

Answer

You can also use the Registry Editor to block the Microsoft account sign-in option for all users. To do this, follow these steps¹:

Press Windows Key + R, type “regedit” in the Run box and enter to open the Registry Editor.

Navigate to : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Right-click on the System key and select New > DWORD (32-bit) Value

Name the new value “NoConnectedUser”

Double-click on the NoConnectedUser value and set its data to 1

Click OK

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