Azure DNS has a new feature available now: alias records This feature lets you map your DNS records to an Azure Traffic Manager profile or a public IP resource such that your DNS zone tracks changes to the IPs associated with those resources. In addition, mapping your zone apex record (root of the zone, for example: contoso.com) to an Azure Traffic Manager profile will allow you to host a DNS load balanced application at the zone apex.
Vist the Azure DNS product page.
Learn more.