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Get-NTFSAccess

Returns a list of all access control entries found on the given object(s).

#Get permissions from all files or folders in the current folder
dir | Get-NTFSAccess

#to read the permissions of a specific file
Get-NTFSAccess -Path C:\Windows

Get permissions from all files or folders in the current folder

dir | Get-NTFSAccess

To read and also remove only the explicitly assigned ones

dir | Get-NTFSAccess -ExcludeInherited | Remove-NTFSAccess

The pipeline support can also be used to backup and restore permissions of one or many items: PowerShell

To backup permissions just pipe what Get-NTFSAccess returns to Export-Csv

dir | Get-NTFSAccess -ExcludeInherited | Export-Csv permissions.csv

To retore the permissions pipe the imported data to Get-NTFSAccess

As the imported data also contains the path you do not need to specify the item

Import-Csv .\permissions.csv | Get-NTFSAccess

All cmdlets can handle SIDs and also SamAccountNames. The output contains always both unless a SID is not resolvable. The types.ps1xml file is extending the common objects with some useful information and the format.ps1xml file formats all the output in almost the same way like the Get-ChildItem output.

By implementing the [Process Privilege http://processprivileges.codeplex.com/] project the cmdlets can activate the required privileges for setting the ownership for example.

Add-NTFSAccess

Adds a specific ace to the current object. This can be done in just one line:

 Get-Item .\VMWare | Add-NTFSAccess -Account Contoso\JohnD -AccessRights FullControl

Get-NTFSAccess

Gives you a list of all permissions . normally you are interested not in the inherited permissions so the switch ExcludeInherited can be useful

Get-Item F:\backup | Get-NTFSAccess –ExcludeInherited

Filtering works with Where-Object

Get-Item F:\backup | Get-NTFSAccess | Where-Object { $_.ID -like "*users*" }

Get-NTFS Orphaned Access

Lists all permissions that can no longer be resolved. This normally happens if the account is no longer available so the permissions show up as a SID and not as an account name.

To remove all non-resolvable or orphaned permissions you can use the following line. But be very careful with that as maybe the account is not resolvable due to a network problem.

dir -Recurse | Get-NTFSOrphanedAccess | Remove-NTFSAccess

Remove- NTFSAccess

Removes the permission for a certain account. As the pipeline is supported it takes also ACEs coming from Get-NTFSAccess or Get-NTFSOrphanedAccess

Get-NTFSEffectiveAccess

Shows the permissions an account actually has on a file or folder. If no parameter is specified it shows the effective permissions for the current user. However you can supply a user by using the SID or account name PowerShell

Get-Item F:\backup | Get-NTFSEffectiveAccess -Account S-1-5-32-545

Get-NTFSInheritance

Shows if inheritance is blocked

Enable-NTFSInheritance

It can be a problem if certain files or folders on a volume have inheritance disabled. Making sure that inheritance is enabled can be done using this cmdlets:

Get-Item .\Data -Recurse | Enable-NTFSAccessInheritance

Disable-NTFSInheritance

See Enable-NTFSInheritance

Get-NTFSOwner

Shows the owner of a file or folder

dir -Recurse | Get-NTFSOwner

Set-NTFSOwner

Sets the owner to a specific account like:

Get-Item .\Data | Set-NTFSOwner -Account builtin\administrators