Traditionally, securing the enterprise cloud has meant moving critical resources like AKS, Azure SQL, and Key Vault behind Private Endpoints. While this posture significantly reduces the attack surface, it often creates a connectivity gap where standard cloud build agents lack native visibility into these private environments. Historically, teams have been forced to choose between the high maintenance of virtual machines or complex, insecure networking workarounds. Managed DevOps Pools resolve this conflict by providing the seamless experience of hosted agents with the security of native Virtual Network integration. This session demonstrates the technical implementation of VNet injection to grant build agents direct access to private resources without the need for firewall modifications or public IP addresses. The presentation demonstrates how to leverage Managed Identities for authentication,, eliminating the risks of Service Principal secrets and the operational burden of password rotation. Furthermore, the session provides a framework for optimizing the total cost of ownership by transitioning from static, idle infrastructure to ephemeral, on-demand agents that scale dynamically with development needs. By the end of the session, participants will have the technical knowledge required to build a secure, cost-effective pipeline foundation that serves the requirements of platform, security, and development teams alike.