For enterprise customers, a regular VPN connection may not be enough. Most of those customers will want to deploy an ExpressRoute connection. In the next part of the chapter, we will go through an ExpressRoute deployment.
First of all, to deploy ExpressRoute, you need some prerequisites. You need a contract with an ISP who connects your office to an MPLS network. That's a thing Microsoft cannot do for you at the moment.
The future goal of Microsoft and other Cloud Providers is, that you can deploy and order even ISP connections for your on premises location via Cloud Provider Portals and it's deployed on demand. In most countries that is some kind of science fiction because it requires a full supported and over all available software defined WAN in-depended from ISP infrastructures.
After you have signed the contract, you need to evaluate the peering location, the peering partner, and the bandwidth with your ISP. You will need this information during the ExpressRoute deployment.
As soon as you have this information, you can start with the deployment.