Zero-Trust Readiness Guide
Adopt zero-trust in order of impact, on a real budget, using the Microsoft security tools you likely already own.
What's inside
- The three principles of zero-trust, in plain English
- What to secure first — identity, devices, data, visibility
- The security capability hiding in your Microsoft 365 licences
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Why this guide
Zero-trust is a strategy, not a product: never trust a request because of where it comes from, verify every one against identity, device and context, and give the least access that does the job. It sounds like a large programme, but most of it is configuration of tools many organisations already license.
This guide sets out the order that delivers the most protection soonest: identity first, then devices, then applications and data, then visibility. It maps each step to the Microsoft 365 and Entra capabilities that deliver it, so you can see what you already own before buying anything.
Common questions
Where should zero-trust start?
With identity. Most modern breaches begin with a valid sign-in in the wrong hands, so phishing-resistant MFA, Conditional Access and least-privilege roles deliver the biggest early reduction in risk.
Do we need to buy new tools for zero-trust?
Often not. Microsoft 365 Business Premium, E3 and E5 include Entra ID Conditional Access, Intune device compliance and Defender, which cover much of the core. The work is designing and configuring them well.
How long does zero-trust take?
It's a journey rather than a project with an end date, but the highest-impact steps, identity and device compliance, can typically be in place within a few months.
Related reading
- CybersecurityZero-Trust, One Step at a TimeZero-trust isn't an enterprise megaproject or a product you buy — it's a strategy adopted in steps, often with tools you already own. A practical playbook.
- CybersecurityIdentity-First Security: ITDRIn 2026 the perimeter is identity, and most breaches start with a stolen login — human or machine. A plain-English primer on ITDR.