You are designing private connectivity from on-premises to VNets in two Azure regions across different geopolitical areas. You also need Microsoft 365 reachability via the circuit, want the two on-premises sites to communicate with each other through Azure, and require the shortest data path to VMs over private peering. Which ExpressRoute design should you recommend?

This option meets all requirements. ExpressRoute Premium is necessary for connectivity across geopolitical regions. Both Microsoft peering (for Microsoft 365) and Private peering (for Azure VNets) are required. Global Reach allows the two on-premises sites to communicate directly through the ExpressRoute network, bypassing Azure VNets for shortest path. FastPath improves data path performance by sending network traffic directly to VMs, bypassing the ExpressRoute gateway. Incorrect options: Local circuits are for the same metro area and don't support cross-region or Microsoft 365 connectivity. Standard circuits don't support cross-geopolitical regions. Microsoft peering alone won't provide VNet connectivity. Site-to-site VPNs add complexity and latency. Two Standard circuits won't support cross-geopolitical regions. Global Reach is supported across regions with Premium. Not using FastPath degrades performance. Azure Front Door is a global load balancer and CDN, not a replacement for private on-premises to Azure connectivity via ExpressRoute.