What is EDR (Endpoint Detection and Response)?
EDR stands for Endpoint Detection and Response. It helps a security team collect endpoint telemetry, investigate suspicious activity, and take configured response actions. Product coverage, response options, and supported devices depend on the platform, licence, agent version, and configuration.
EDR is an endpoint security capability, not a complete security programme. It can help identify suspicious process, network, sign-in, and file activity and support containment, but it does not replace identity controls, email security, patching, backups, recovery testing, or an incident plan.
Detection, investigation, containment, and recovery are separate decisions.
EDR products collect security telemetry from enrolled endpoints and help teams investigate incidents. The useful question is not whether a licence says EDR; it is who owns the alerts, which actions are enabled, and how the response is tested.
Collect relevant endpoint signals.
Depending on the product and configuration, telemetry can include process, network, sign-in, registry, file-system, and other endpoint activity. EDR is not a promise to record every operation or identify every threat.
Turn alerts into an incident view.
Alerts can be grouped and investigated across affected devices. A team still needs an owner, escalation rules, evidence handling, and a way to distinguish a true threat from a false positive.
Use response actions deliberately.
Depending on product, permissions, device state, and automation settings, response may include isolating a device, quarantining a file, stopping a process, or collecting an investigation package. Test network, VPN, proxy, and emergency-access dependencies first.
Keep recovery outside the EDR licence.
EDR may help contain an attack, but it does not replace identity hardening, email protection, patching, offline or separately scoped backups, restoration tests, or an incident-response plan.
EDR and antivirus are related rather than mutually exclusive. Behavioural detection and response add useful visibility beyond a basic signature match, but coverage varies by operating system, product edition, exclusions, enrolment, and policy. Confirm the exact platform and supported devices before deployment.
Do not promise that EDR will stop ransomware or respond within a fixed time. Layered controls, safe administrative access, tested backups, user reporting, and a rehearsed response process determine how much damage can be limited.
Microsoft says Defender for Business is designed for small and medium-sized organizations up to 300 users and is included in Microsoft 365 Business Premium. North Star can scope Microsoft Defender for Business or SentinelOne around the client environment, licensing, endpoints, alert ownership, escalation, and recovery responsibilities; the assessment is not a promise of a particular product or response service.
Sources checked September 13, 2026: Microsoft Defender for Business overview, Microsoft automated investigations, and CISA ransomware guidance.
Quick answers.
What is EDR?
EDR stands for Endpoint Detection and Response. It collects endpoint security telemetry and helps a security team detect, investigate, and respond to suspicious activity. Product coverage and response actions depend on the platform and configuration.
Is EDR different from antivirus?
EDR adds behavioural telemetry, investigation, and response workflows to endpoint protection. It complements rather than automatically replaces antivirus, identity controls, email security, patching, and backups.
Can EDR stop ransomware?
EDR can help detect suspicious activity and support containment, but no product guarantees prevention or a fixed response time. Use it with layered identity and email controls, tested backups, user reporting, and an incident-response plan.
Is Microsoft Defender for Business an EDR product?
Yes. Microsoft describes Defender for Business as an endpoint security solution based on Defender for Endpoint, and Microsoft 365 Business Premium includes it. Confirm the exact subscription, supported devices, policies, and response ownership before relying on the entitlement.
Does EDR work on Mac and Linux?
Some EDR products support Windows, macOS, and Linux, but exact support and response actions depend on the product, agent version, operating system, and deployment mode. Verify the current compatibility documentation before rollout.
Can I use EDR without an MSP?
Yes, if your organization assigns people to triage alerts, investigate incidents, maintain policies, and perform response and recovery. North Star can scope deployment or managed support, but the proposal must define alert ownership and response terms.
What does EDR cost?
There is no universal per-device price. Total cost depends on the product and edition, endpoint count and type, licensing bundle, onboarding, policy work, monitoring, response ownership, and recovery scope. Request an exact scope rather than treating a generic estimate as a quote.
What EDR does North Star use?
North Star can evaluate Microsoft Defender for Business or SentinelOne against the client environment, licensing, endpoints, and operating model. The right choice depends on requirements and agreed responsibility; this page does not promise a default platform.
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Product features, supported platforms, and response actions change. Check the current vendor and public-safety guidance before making a security decision.