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Use Windows ACL to Manage User Permissions on the QNAP NAS


Windows ACL allows the QNAP NAS administrator to configure file and folder permissions for the local and domain users on the NAS from Windows Explorer.  The administrator can add, modify, and remove Windows ACL permissions of the NAS on Windows XP, Vista, Windows 7, Windows Server 2003, and Windows 2008.


The QNAP NAS firmware must be v3.7.0 or above.

Login the NAS as “admin”. Go to “Privilege Settings” > “Share Folders” > “Advanced Permissions”, select “Enable Windows ACL Support” and click “Apply All”.Enable Windows ACL


When Windows ACL is enabled while Advanced Folder Permissions are disabled, the file and folder permissions will only apply to Samba service.  To apply the permission settings to Samba, FTP, AFP, and Web File Manager, please also enable “Advanced Folder Permissions”.

Configure basic permissions

Open Windows Explorer and connect to the NAS via Samba.  Right click a shared folder and select “Properties”.  Under the “Security” tab are the permission settings.  Click “Edit”.

Select a user name (NAS local or domain user).  Modify the permissions for the user and click “Apply”.

Configure advanced permissions

To configure advanced permissions, right click a shared folder and select “Properties”.  Click “Advanced” under the “Security” tab.

Click “Change Permissions”.

Click “Edit” to configure the advanced permissions.  Modify the permission settings and click “Apply”.

Calculate effective permissions

To calculate the effective permissions of a user account, right click a shared folder and select “Properties”.  Click “Advanced” under the “Security” tab.

Select the “Effective Permissions” tab.  Under “Group or user name” click “Select”; input a user or group name.  Click “OK”.

The effective permissions of the user or group will be shown.


Updated on July 26, 2017

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