Defender for Business or Defender for Endpoint: which do we need?

Key facts

• Defender for Business is designed for organizations with up to 300 users.
• Business Premium includes Defender for Business.
• Microsoft 365 E3 includes Defender for Endpoint Plan 1; E5 includes Plan 2.
• Defender for Endpoint Plan 1 does not include endpoint detection and response.
• Servers need separate server licensing in either case.

The short comparison

All three options share Microsoft's next-generation antivirus and attack surface reduction rules. Defender for Business adds endpoint detection and response and automated investigation with a simplified setup for smaller organizations. Defender for Endpoint Plan 2 adds the full enterprise toolset, including advanced hunting.

Feature placement changes over time. Check current Microsoft documentation before deciding.

When Defender for Business fits

For most small businesses, Defender for Business delivers the protection they need. The key is onboarding every device and actually reviewing incidents, or having a partner do it.

• You have up to 300 users and no plans to pass that soon.
• You own Business Premium or want endpoint protection as a standalone purchase for a small business.
• You want EDR and automated response without a full-time security analyst.
• You prefer simple, guided configuration over fine-grained enterprise settings.

When Defender for Endpoint fits

If you are on E3, be clear about the gap: Plan 1 blocks threats but does not include EDR or automated investigation. Many E3 customers add Plan 2 or the E5 Security add-on for that reason.

• You have more than 300 users, or you are on Enterprise licensing.
• You have security staff or a managed detection provider who will use advanced hunting.
• You need granular role-based access, device groups and enterprise reporting.
• You want endpoint data feeding a wider Defender XDR investigation across email, identity and cloud apps.

Onboarding and configuration

Owning a license protects nothing until devices are onboarded and policies are set. With Intune, you can onboard Windows, macOS, iOS and Android devices and push antivirus, firewall and attack surface reduction settings from one place.

Roll out attack surface reduction rules in audit mode first, review what they would block, then enforce. Turn on tamper protection, set up alert notifications to a monitored mailbox and decide who reviews incidents each day.

• Confirm every endpoint is onboarded and reporting.
• Remove or set passive mode for third-party antivirus where needed.
• Enable tamper protection.
• Pilot attack surface reduction rules in audit mode.

Mixed and growing tenants

If you grow past 300 users or mix Business Premium with E3 or E5, you may end up with both products in one tenant. Microsoft has guidance on how mixed licensing behaves, and the experience can change once Defender for Endpoint licenses are present. Plan the transition rather than letting it happen at renewal.

Servers are separate in both cases. Plan server protection through the appropriate Microsoft server licensing for your environment.

How Accred Consulting approaches it

Accred Consulting reviews your user count, licensing, devices and who will respond to alerts, then recommends Defender for Business or Defender for Endpoint. Accred then deploys it: our US-based specialists onboard devices through Intune, configure antivirus, tamper protection and attack surface reduction rules in stages, and set up alerting and response workflows. The proposal sets a fixed price, scope and timeline, and handover includes documentation and knowledge transfer.

Track record: 475+ client projects, 2,000+ migration workstreams and 210,000+ users migrated by a US-based team. Company facts · Case studies

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