Azure DNS SLA: Updated to 100%
Azure DNS is being offered at 100% availability SLA, guaranteeing that valid DNS requests will receive a response from at least one Azure DNS name server 100% of the time.
29/06/2018
Zone-redundant VPN and ExpressRoute virtual network gateways are now generally available. This physically and logically separates them across different availability zones, protecting your on-premises network connectivity to Azure from zone-level failures. Additionally, we have made fundamental performance improvements including reducing the deployment time to create a virtual network gateway.