Extend eligible Microsoft 365 F5 licensing with advanced protection across identity, endpoints, email and cloud applications. Microsoft 365 F5 Security Add-on brings security capabilities into the same user-focused Microsoft 365 environment used by frontline workers, helping security teams investigate activity that spans user identities, devices, messages and SaaS access. The entitlement is suited to organizations standardizing security controls for shared-device, shift-based and distributed frontline populations. It supports a layered security posture: identity controls can govern access, endpoint protection can detect and respond to device threats, email protection can address malicious messages, and cloud-app visibility can help identify risk across connected services. Cross-domain XDR workflows help analysts correlate related signals instead of working with isolated alerts. Microsoft ordering code 5F3D0C71C490 is the M365 F5 Security Add-on entitlement. Within the Microsoft 365 F5 family, its distinction is its security-focused expansion of qualifying F5 user licensing rather than a general productivity upgrade. It is relevant where frontline users require security monitoring and response coverage consistent with broader enterprise protection policies while retaining the F5 licensing foundation.