BlueYonder wants to publish some public IP prefixes to reach Office 365 and Azure PaaS from their ExpressRoute circuit, and also connect their on‑premises routers to VNets using private IPs. How should they use Private Peering vs Microsoft Peering to achieve both needs?

The correct option accurately describes the distinct roles of Private Peering and Microsoft Peering in ExpressRoute. Private Peering is designed for connecting your on-premises network to Azure VNets using private IP addresses, enabling secure and direct communication between your data center and your Azure resources. Microsoft Peering, on the other hand, is specifically for accessing Microsoft online services like Office 365 and Azure PaaS services using public IP addresses. It allows you to advertise your public prefixes to Microsoft and receive Microsoft service prefixes. The incorrect options propose misconfigurations or misunderstandings of ExpressRoute peering types. Private Peering does not carry Microsoft service prefixes (Office 365), nor does Microsoft Peering automatically handle private IP connectivity to VNets. Relying solely on one peering type for both public and private connectivity is not how ExpressRoute is designed to function. Route filters are used with Microsoft Peering to control which Microsoft service prefixes are received, not to enable public service access through Private Peering.