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mdo

Microsoft Defender for Office 365:: MDO

Office 365 ATP · Office 365 Advanced Threat Protection

in plain english

The email and collaboration security layer — Safe Links, Safe Attachments, anti-phishing with impersonation protection, attack simulation training. Sits on top of EOP.

official microsoft definition

Safeguards organizations against malicious threats posed by email messages, links (URLs), and collaboration tools (Teams, SharePoint, OneDrive). Extends Exchange Online Protection.

plans & eligibility

  • Plan 1 — Safe Links + Safe Attachments + anti-phishing (M365 Business Premium, included in some E3 paths)
  • Plan 2 — adds Threat Explorer, Attack Simulation Training, Automated Investigation (M365 E5)
$ open portal → microsoft learn docs →

related on aguidetocloud

/defender-office-365 · /defender-for-office · /atp

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