PowerShell add users to group based on OU - Schedule script

Hello,

I am trying to schedule a script to run that will only add users to a security group based on the OU they are in. I keep on getting these errors. This is my first attempt at creating a Powershell script so forgive my errors in the code.

Import-Module ActiveDirectory

$OU1 = 'OU=Test_Group,OU=Priviledged_Access,OU=_Users,DC=domain,DC=org'
$SecGroup = (Get-ADGroup -Identity 'PasswordPolicy').DistinguishedName

Get-ADUser –SearchBase $OU1 –LDAPFilter (&(objectCategory=person)(objectClass=user)!(memberOf=$SecGroup)) | ForEach-Object {Add-ADPrincipalGroupMembership -Identity $_ –MemberOf "$SecGroup"}