Windows NTFS filesystem - user cannot access file using Administrators group permissions

Question

There is a shared folder on the computer running Windows 2012R2 with a NTFS filesystem.

There is a local User X who is part of the local Group Administrators on the computer.

The Shared folder is configured like this for Sharing permissions and local Security permissions:

• Sharing -> Permissions -> Full control for User X
• Security -> Full control for Group Administrators (no reference to User X)

The issue is that when connecting via a remote computer (Windows 10) using network file sharing and User X credentials, User X can access the files in the Shared folder (read) but it unable to edit them (write, modify, delete).

There is no reference to User X in the folder/file permissions (neither allow or deny) but since User X is part of Group Administrators and Group Administrators has Full control permissions for the Shared folder, why can't User X modify the files?

Answer 1

Check to what the permissions apply: Open properties on the folder, switch to the security tab and klick advanced. Select your admin group and klick edit. Check what is selected on Applies to:

Also check the inheritance (marked green in the picture). If it is disabled, you might want to enable it. This will rewrite all subfolders permissions with this ones.