ExpressRoute gives you a fast and reliable connection to Azure with bandwidths of up to 100 Gbps. This makes it excellent for scenarios such as periodic data migration, replication for business continuity, disaster recovery and other high-availability strategies. It can be a cost-effective option for transferring large amounts of data, such as datasets for high-performance computing applications, or moving large virtual machines between your dev-test environment in an Azure virtual private cloud and your on-premises production environments.

Use ExpressRoute to both connect and add compute and storage capacity to your existing data centres. With high throughput and fast latencies, Azure will feel like a natural extension to or between your data centres, so you enjoy the scale and economics of the public cloud without having to compromise on network performance.

With predictable, reliable and high-throughput connections offered by ExpressRoute, build applications that span on-premises infrastructure and Azure without compromising privacy or performance. For example, run a corporate intranet application in Azure that authenticates your customers with an on-premises Active Directory service, and serve all your corporate customers without traffic ever routing through the public Internet.