Powershell script to backup a domain gpo list

Backup-GPOs.ps1

# Date: 10-2015
# Author: Felipe Molina (@felmoltor)
# Summary: Authomatize the backup proccess of GPO for a domain.
# Create a folder with the time when this script was executed and inside it a folder for each GPO of the domain
# The program needs two mandatory parameters: 
#  * Domain: The domain from where we want to backup the GPOs
#  * backuppath: The path to the folder where we want to store this backups

param(
    [Parameter(Mandatory=$True,Position=1)][String]$domain,
    [Parameter(Mandatory=$True,Position=2)][String]$backuppath
)

import-module grouppolicy 

$today = Get-Date -Format "yyyy-MM-dd_HHmmss"

# Check if the backup path exists
if (-not (Test-Path($backuppath))) {
    $r = Read-Host -Prompt "$backuppath does not exists, do you want to create it and continue? [y/N]: "
    if ($r-eq "y" -or $r -eq "Y"){
        New-Item -ItemType directory $backuppath > $null
    }
    else {
        # The script stops
        Write-Host "User stoped the script execution. Exiting now."
        exit
    }
}

# Create the folder for today backup
$dstfolder = $backuppath+"\"+$today
New-Item -ItemType directory $dstfolder > $null

if (Test-Path $dstfolder){
	write-host "The GPOs will be saved in the folder $dstfolder"
}
else {
	write-host -foregroundcolor "red" "There was some error creating the folder $dstfolder. Check your permisions and the existence of the path. Exiting now"
	exit 1
}

$policiesnames = get-gpo -All  -Domain $domain | select DisplayName

# create the backup folder structure
$policiesnames | ForEach-Object {
    $polname = $_.DisplayName
    # Backup each gpo inside its folder
    $gpofolder = $dstfolder+"\$polname"
    Write-Host " Backing up in $gpofolder"
    New-Item -ItemType directory -Path $gpofolder > $null
    Backup-GPO -Name "$polname" -Path $gpofolder -Comment "$polname" -Domain $domain > $null
}