After deploying this template https://github.com/Azure/azure-quickstart-templates/tree/master/active-directory-new-domain-ha-2-dc I have some nested templates resources in my Resource Group.
How can I modify the original template so that nested templates work as intended, but don't appear in the Resource Group?
No, those are not nested template leftovers, those are VM extensions that you've installed on your vm's to do things (create domain, in this case).
Recently Microsoft introduced a debatable change, where several types of resource that were previously invisible in the portal (in resource group view) became visible.
As far as I know, there it no way to make them go away, besides deleting the VM extensions, which can probably be done in your case, as the Domain was already established.
