Check if OU exists before creating it

Question

function NyChildOU {
  $overOU = Read-Host "Type in the name of the parrent OU"
  $oucheck = [adsi]::Exists("LDAP://OU=$overOU,OU=PS,DC=PS,DC=local")
  if ($oucheck -eq "true") {
    $navnpaaou = Read-Host "Type in the name of the new OU"
    $oucheck2 = [adsi]::Exists("LDAP://OU=$navnpaaou,OU=$overOU,OU=PS,DC=PS,DC=local")
    if ($oucheck2 -eq "false") {
      New-ADOrganizationalUnit -Name $navnpaaou -path "OU=$navnpaaou,OU=$overOU,OU=PS,DC=PS,DC=Local"
      Write-Host "The new entry: $navnpaaou is created within $overOU"
    } else {
      Write-Host "OUen $navnpaaou do exist within $overOU"
    }
  } else {
    Write-Host "OUen $overOU doesen't exist, trie again"
  }
}

This is my script, the purpose of which is to create a OU unless it already exist. I just can't figure out what's wrong with my code.

Answer 1

Simply check if Get-ADOrganizationalUnit returns an OU with that distinguished name and create it otherwise:

$parentOU = 'OU=parent,OU=PS,DC=example,DC=com'
$navnpaaou = Read-Host "Type in the name of the new OU"
$newOU = "OU=$navnpaaou,$parentOU"
if (Get-ADOrganizationalUnit -Filter "distinguishedName -eq '$newOU'") {
  Write-Host "$newOU already exists."
} else {
  New-ADOrganizationalUnit -Name $navnpaaou -Path $parentOU
}