Now available – Azure DNS private zones now available
Azure DNS private zones provide a simple, reliable, secure DNS service to manage and resolve names in a virtual network, without the need for you to create and manage a custom DNS solution. This new capability lets you use your own company domain rather than the Azure-provided names available today, provides name resolution for virtual machines (VMs) within a single virtual network and across multiple virtual networks. Additionally, you can configure zones names with a split-horizon view, allowing for a private and a public DNS zone to share the same name.
Source: Azure Roadmap