This policy prevents automatic copying of user input methods to the system account for use on the sign-in screen. The user is restricted to the set of input methods that are enabled in the system account. The recommended state for this setting is: Enabled. Rationale: This is a way to increase the security of the system account. Impact: Users will have input methods enabled for the system account on the sign-in page.
Solution
To establish the recommended configuration, set the following Device Configuration Policy to Enabled: To access the Device Configuration Policy from the Intune Home page: Click Devices Click Configuration profiles Click Create profile Select the platform (Windows 10 and later) Select the profile (Administrative Templates) Click Create Enter a Name Click Next Configure the following Setting Path: Computer Configuration\System\Locale Services Setting Name: Disallow copying of user input methods to the system account for sign-in Configuration: Enabled Select OK Continue through the Wizard to complete the creation of the profile (profile assignments, applicability etc.) Note: More than one configuration setting from each of the Configuration profiles (ex: Administrative Templates, Custom etc.) can be added to each Device Configuration Policy. Default Value: Disabled. (Users will be able to use input methods enabled for their user account on the sign-in page.)