The ExtremeCloud™ Universal ZTNA User Guide for version 25.2.0 provides a comprehensive framework for secure network, application, and device access, regardless of user location. It details the implementation of identity-based Zero Trust policies to ensure consistent, secure access across both campus and remote environments. Key technical configurations include integrating identity providers such as Microsoft Entra ID and Google Workspace, deploying RadSec proxies, service connectors, and network policies. The guide covers secure network application access through RADIUS, IPsec, and WireGuard encryption protocols, with extensive compatibility across various operating systems and hardware platforms like SwitchEngine and FabricEngine. It also includes comprehensive onboarding instructions for setting up users, devices, applications, and configuring role-based access controls. Advanced topics such as monitoring, application discovery, and cloud platform integration for managing user identities and network security posture are also addressed.