This guide outlines the planning process for implementing a Secure Access Service Edge (SASE) architecture within an organization. It begins by describing the need for a migration plan from traditional networking and security models to a more flexible SASE framework, which integrates networking and security into a single cloud-native architecture. The document emphasizes the importance of collaboration between networking and security teams to ensure a successful transition. It also details the objectives organizations may have when adopting SASE, such as facilitating remote work, supporting global business locations, and providing secure access to cloud resources. The guide further discusses the necessity of gathering requirements related to sites, users, and cloud resources, highlighting the importance of understanding the specific needs of various work environments and user types. Additionally, it addresses considerations for high availability and performance in SASE deployments, ensuring that the architecture meets the operational demands of modern enterprises.