Microsoft 365 Device Management — what it does and how to use it

Microsoft 365 device management uses Microsoft Intune and Azure AD to register, secure and manage Windows, iOS, Android and macOS devices from a single console; businesses typically set up conditional access, encryption and patch controls in one admin pane to reduce data risk and support compliance.

Many UK firms discover gaps only after an incident: a former contractor’s phone still had access, or a patch missed across several laptops. That common pattern — scattered device owners, inconsistent enrolment and unclear responsibilities — turns simple access into a compliance risk and IT drain. The reader should take away one clear point: treat device management as a small-IT programme, not a checkbox.

Action 1 — Get the estate under control: policies, inventory and enrolment

Start by creating a short, enforceable device policy that specifies which devices are permitted, mandatory controls and who owns enrolment. Keep this policy tightly scoped: name supported OS versions, required patch cadence, disk encryption and whether personal devices are allowed. Use Microsoft Intune as the single enrolment path so every managed device appears in Azure AD and Intune inventory; this avoids spreadsheets and scattered firewall rules.

Concrete steps to do this in the next 30 days:

Run a one-week discovery: collect serials, OS, owner and last check-in via Intune or an existing RMM tool.
Define three mandatory controls: device encryption (BitLocker/FileVault), automatic updates and a locked passcode or Windows Hello.
Decide a bring-your-own-device (BYOD) stance and the minimum OS versions you will accept.
Publish the policy and a two-step enrolment guide for staff (self-enrol for mobiles, IT-assisted for desktops).

These controls are the simplest way to stop the most common leaks: lost devices, unmanaged remote work and stale accounts. If you need technical support for enrolment, consider starting with an external partner; our Microsoft 365 support for business page explains typical engagement models and handover points.

Action 2 — Operate, monitor and prove it: conditional access, updates and audits

Once devices are enrolled, turn policy into automated enforcement. Use Azure AD conditional access to require device compliance for sensitive apps (Exchange, SharePoint, Teams). Configure Intune update rings and patch reporting so you can see unpatched endpoints; set a strict SLA for critical updates. Combine automated alerts with a weekly audit task and one monthly compliance report for leadership.

Operational checklist to embed:

Enable conditional access for cloud apps and exclude only approved service accounts.
Set update rings: critical patches applied within 7 days, other updates within 30 days.
Create an exceptions process: temporary exemptions must be logged with an owner and expiry date.
Schedule a monthly audit: device counts, compliance percentage and any stale accounts older than 30 days.

Make the monthly report short and focussed: total managed devices, percentage compliant, number of non-compliant devices older than seven days and any outstanding removals for leavers. Use those numbers in staff leaver-checklists and HR offboarding so device removal becomes part of payroll/HR workflows rather than an IT scavenger hunt.

FAQ

Do I need Microsoft Intune to use Microsoft 365 device management?

Yes — Intune is the Microsoft service that provides enrolment, policies and remote wipe; it is included in Business Premium or available as a separate licence tied to Azure AD management.

How long does a typical device enrolment project take for 10–200 users?

A straightforward rollout with staged self-enrolment and IT support usually completes in about 2–6 weeks, depending on user cooperation and the number of legacy machines needing reimaging.

What happens if a device with customer data is lost — could we be fined?

If personal data is exposed and you fail to meet data-protection obligations, the ICO can impose fines up to £17.5 million or 4% of global turnover (whichever is higher); follow the ICO’s guidance on breach response and record keeping (ICO’s guidance for organisations).

Which checks should we add to the HR leaver process to remove device access?

Include four checks: reclaim company devices, remove Azure AD and Microsoft 365 licences, revoke conditional-access sessions, and disable MFA sessions within 24 hours of termination.

Next step: pick one small tranche of staff (a team or site) and run the 30-day discovery and enrolment steps — that single pilot will show the gaps, reduce immediate risk and give you the metrics to justify a full rollout. If you’d like help turning those pilot results into a fixed-cost plan that saves time and strengthens compliance, contact a specialist and set a delivery window.