Intune and Defender Endpoint Control

This guide is meant for the real review, not the polished meeting version. The point is to decide whether Intune and Defender are genuinely controlling the estate, or whether the tenant just looks busy.

Endpoint onboarding quality

Start with coverage. If device coverage is partial, every later metric is weaker than it looks.

• All supported Windows device types onboarded to Defender for Endpoint
• Corporate devices enrolled or otherwise intentionally managed
• Unknown or unmanaged devices pushed into a remediation list, not ignored
• Device inventory reviewed weekly for gaps, duplicates, and stale records

Baseline and compliance enforcement

The next question is whether access actually depends on device state.

• Compliance policies tied to Conditional Access for the apps that matter
• Supported OS versions enforced in compliance policy
• Defender risk integrated into compliance where licensing allows
• Security baselines reviewed, versioned, and not layered blindly on top of custom policy
• Local admin rights controlled through account protection, EPM, or an equivalent reviewed model

Alert and remediation workflow

If an alert lands and nobody clearly owns it, you do not really have a control. You have a queue.

• Alert severity mapped to named owners
• Isolation, malware response, and re-onboarding playbooks documented
• Defender incidents reviewed for false positives and repeat causes
• Lessons from incidents fed back into policy, exclusions, and packaging decisions

Policy quality and drift checks

This is the bit many teams skip. They monitor alerts, but not whether the policy surface itself is drifting.

• Duplicate settings across baselines, settings catalog, and endpoint security reviewed out
• Per-setting conflicts checked when devices behave strangely
• Old pilot groups, temporary exclusions, and emergency exceptions removed on schedule
• Autopilot, update, and compliance assignments checked after major tenant changes

Evidence you should be able to pull quickly

If a customer, assessor, insurer, or internal lead asks for proof, this is the practical shortlist:

• current device coverage numbers
• compliance posture by operating system
• list of devices above the accepted risk threshold
• active local admin exceptions
• recent high-severity incidents and closure state
• the owner for each major endpoint control area

If gathering that evidence still turns into a scavenger hunt, the endpoint model needs more work.

Minimum operating rhythm

Weekly:

• review onboarding gaps
• review high-risk devices
• review severe incidents

Monthly:

• review policy conflicts and assignment failures
• review stale exceptions
• review baseline drift and tuning needs

Quarterly:

• review whether each major control still has the right owner
• review whether exclusions still make business sense

This is not glamorous work. It is the work that keeps endpoint control believable.

References

• Onboard devices and configure Microsoft Defender for Endpoint capabilities
• Windows compliance settings in Microsoft Intune
• Manage device security with endpoint security policies in Microsoft Intune