PowerShell Script: Setting NTFS Permissions in Bulk

Today I wrote this PowerShell script to apply a same set of NTFS permission for a particular user or group to a list of folders. It reads the list of folders from a file that is specified from a parameter, apply the permission which is also specified  from parameters. The useage is as follow:

.\BulkSet-NTFSPermissions.ps1 -FolderListFile x:\xxxx\xxxx.txt -SecIdentity "Domain\Group" -AccessRights "FullControl" -AccessControlType "Allow"

• FolderListFile: a flat text file containing the list of path that need to apply the NTFS permission. It needs to list one folder per line. the path can be a absolute local path such as C:\temp or a UNC path such as \\computer\C$\temp.
• SecIdentity: The security identity (such as a user account or a security group) the permission is applied for.
• AccessRights: type of access rights, such as FullControl, Read, ReadAndExecute, Modify, etc..
• AccessControlType: Allow or Deny

This script checks the permission before applying for it. if the user / group already has the permission that we specified to a folder from the list, it will skip this folder and move to the next one. I had to use this script to grant a group full control rights to over 9000 folders. It only took around 40 minutes to run. I was very impressed!