Modify User Permissions using Powershell

Question

I am new to PowerShell and I am trying to add a local user called 'Tree' with read-only and list permissions to all files and folders in a directory on my F:\ drive and force the permissions to propagate and not change any existing permissions

Answer 1

You can do it with icacls.exe.

icacls.exe F:\ /grant "Tree:(OI)(CI)(RX)"

Or with Powershell cmdlets.

$Folder = 'F:\'
$ACL = Get-Acl  $Folder
$ACL_Rule = new-object System.Security.AccessControl.FileSystemAccessRule ('Tree', "ReadAndExecute",”ContainerInherit,ObjectInherit”,”None”,”Allow”)
$ACL.SetAccessRule($ACL_Rule)
Set-Acl -Path $Folder -AclObject $ACL 

If you have folders that do not inherit permissions from their parent folder, the access will not be applied to them.

As always, try this on a test folder first.