The networking resources (such as NICs and load balancers) for new Azure HDInsight clusters created in a virtual network are now provisioned in the same HDInsight cluster resource group.
Previously, these resources were provisioned in the HDInsight virtual network resource group. There is no change to the current running clusters and those clusters created without a virtual network.
This is useful in cleanup scenarios. When you delete the resource group, all necessary resources associated with the HDInsight cluster will be deleted from the same resource group.