Vendor Profile

Microsoft Defender for Office 365

Microsoft Defender for Office 365 is Microsoft's native email security solution that provides protection against phishing, malware, and business email compromise for Microsoft 365 environments. It integrates deeply with the Microsoft security ecosystem including Microsoft Sentinel, Defender XDR, and Entra ID to provide cross-domain threat detection and automated investigation. For organizations heavily invested in Microsoft 365, Defender for Office 365 offers strong protection without requiring a third-party email security gateway.

Last updated

Founded
2015
Pricing
Plan 1 from $2/user/month / Plan 2 from $5/user/month / included in E5
Verify with vendor
Deployment
Cloud
Cloud Email Security

Key Features

+Safe Links (URL detonation and rewriting)
+Safe Attachments (sandbox analysis)
+Anti-phishing with impersonation protection
+Automated investigation and response (AIR)
+Attack simulation training
+Threat Explorer for hunting and analysis
+Real-time reports and threat analytics
+Integration with Microsoft Defender XDR

Pros & Cons

Pros

  • +Deep native integration with Microsoft 365 and Defender XDR ecosystem
  • +Included in Microsoft 365 E5 — significant cost savings for E5 customers
  • +Automated investigation and response reduces analyst workload
  • +Cross-domain detection correlates email threats with identity and endpoint signals
  • +Continuous improvement from Microsoft's massive threat intelligence network

Cons

  • Only protects Microsoft 365 — does not support Google Workspace or other platforms
  • Detection efficacy for advanced threats historically behind Proofpoint and Mimecast
  • Configuration complexity across multiple Microsoft security portals
  • Plan 1 lacks important features like AIR and Threat Explorer
  • Less effective at catching novel social engineering attacks

Best For

Microsoft 365-centric organizations wanting native email security with XDR integration and cost efficiency through E5 licensing

User Reviews

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Sources & References

  1. Microsoft Defender for Office 365 — Official Website & Documentation[Vendor]
  2. Microsoft Defender for Office 365 Reviews on G2[User Reviews]
  3. Microsoft Defender for Office 365 Reviews on TrustRadius[User Reviews]
  4. Microsoft Defender for Office 365 Reviews on PeerSpot[User Reviews]

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