Provided you have installed the free Microsoft RSAT tools, here is a simple way to check whether an OU exists:
$OUPath = 'OU=TestOU,DC=train,DC=powershell,DC=local' $exists = $(try { Get-ADOrganizationalUnit -Identity $OUPath -ErrorAction Ignore } catch{}) -ne $null "$OUPath : $exists"
$exists will be $true or $false, indicating whether the OU was found. Note the use of try/catch error handling: Get-ADOrganizationalUnit can raise terminating errors when the specified OU does not exist, so try/catch is needed to capture these exceptions.
