A Conditional Access policy that required an app protection policy nobody deployed in Intune blocked mobile users on day one. For security architects and CISOs: a 7-layer dependency model for Microsoft 365 tenant security, Cloud Harbor Consulting's 5-step build sequence for Entra ID, Intune, Conditional Access, Purview, and Defender XDR, and the verification step that closes gaps like this before they ship.

Email is still the top entry point for ransomware, BEC, and credential theft. Architects choosing between Exchange Online Protection, Defender for Office 365 Plan 1, and Plan 2 have to answer one question: which tier, at what licensing cost, gets the organization to a defensible posture. This article covers what each tier does, the cost-of-breach math, and the 5 questions that decide Plan 1 versus Plan 2.

Zero Trust isn’t a product—it’s a decision framework. This post explains how Microsoft 365 enforces consistent access decisions across identity, endpoints, apps, data, and unified security operations to reduce cost, risk, and improve compliance defensibility.