Remove Protect Object setting from Organizational Unit via PowerShell

Fortunately one can always look for powershell solution to fix this.

Import-Module activedirectory 

# Path to search in for OU's
$searchbase = "OU=Users,OU=Accounts,OU=Production,DC=test,DC=pl"

# Get all the OU's that are protected
$protectedOrganizationalUnits = Get-ADOrganizationalUnit -searchbase $searchbase -filter * -Properties ProtectedFromAccidentalDeletion | where {$_.ProtectedFromAccidentalDeletion -eq $true}

# Display OU's that are protected
$protectedOrganizationalUnits | Select DistinguishedName, ProtectedFromAccidentalDeletion, Name

# Disable protection
#$protectedOrganizationalUnits | Set-ADOrganizationalUnit -ProtectedFromAccidentalDeletion $false

And that's it. Keep in mind the last line of script is disabled so that if you copy paste you have to remove # to make sure it works as required. I usually tend to display things first and uncomment later just to make sure the output is what I expected.