If you can't add or are unable to create a new Local User Account in Windows 11/10, then this post is sure to interest you, as it offers a fix.

Learn how to create Mandatory User Profiles in Windows. They are helpful on computers where end users need to have limited access. It makes sure that no changes are saved.

You create new users on your Linux servers and let those admins do their thing. Problem is, when you create a new user, that user doesn’t have admin privileges.

In the resulting window (Figure B), click the create drop-down and select User. Figure B The ONLYOFFICE User management portal. Fill out the necessary details for the new user (Figure C).