Many modern buildings quietly host networks that facilities and IT never approved: contractor Wi‑Fi for commissioning, tenant IoT meshes, vendor‑managed sensors, and rogue access points. These 'shadow networks' cause RF interference, create unmanaged attack surface, complicate troubleshooting, and extend mean time to repair. In this episode Alex Morgan talks with Michael Harrington to map where undocumented wireless and IoT show up, why they persist, and pragmatic ways property teams detect, prioritize, and remediate them without alienating tenants. We break down operational causes, tradeoffs between enforcement and continuity, and how to bake detection and governance into lifecycle planning so buildings stay resilient and serviceable. Listeners will hear real-world examples, low‑friction discovery techniques, governance patterns that respect tenant needs, and a concise checklist property teams can use on day one to reduce blind spots and speed incident resolution.