Explanation
https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/sap/hana-network-architecture Express Route Global Reach Microsoft introduced a new functionality called ExpressRoute Global Reach.
Global Reach can be used for HANA Large Instances in two scenarios: Enable direct access from on-premises to your HANA Large Instance units deployed in different regions Enable direct communication between your HANA Large Instance units deployed in different regions Direct Access from on-premises In the Azure regions where Global Reach is offered, you can request enabling the Global Reach functionality for your ExpressRoute circuit that connects your on-premises network to the Azure virtual network that connects to your HANA Large Instance units as well.