$288 comes from here: https://aws.amazon.com/directoryservice/pricing/
It looks like AD Connector is much less: https://aws.amazon.com/directoryservice/other-directories-pr...
It looks like AD Connector is much less: https://aws.amazon.com/directoryservice/other-directories-pr...
$0.12 * 24 * 30 = $86.40/month.
I'd change the statement in my parent post, but I don't seem to be able to edit it.