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    Microsoft Defender for Office 365

    Email SecurityIntegrated Cloud Email Security (ICES)BEC ProtectionAnti-Phishing

    Microsoft Defender for Office 365 is Microsoft’s email security service for Microsoft 365, aimed at protecting Exchange Online mailboxes and related collaboration surfaces from phishing, malware, and business email compromise. Microsoft positions it as the primary email and collaboration security layer above the baseline protections in Microsoft 365, with Plan 1 for core advanced threat protection and Plan 2 for deeper hunting and response. It is best suited for organizations already standardized on Microsoft 365 that want native protection, policy control, and security operations workflows inside the Microsoft ecosystem.

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    Ask about pricing, alternatives, or if Microsoft Defender for Office 365 is right for you.

    Picari insights

    Organizations already standardized on Microsoft 365 seeking native, integrated email security within their existing ecosystem.

    Best for
    • Microsoft 365 native threat protection
    • Streamlined security operations within Microsoft ecosystem
    • Consolidated licensing and vendor management
    May not be ideal if
    • Organizations not using Microsoft 365
    • Companies seeking a multi-platform email security solution
    • Environments requiring highly specialized, non-Microsoft threat intelligence

    Core capabilities

    Advanced zero-day phishing and malware defense
    Provides protection against advanced, zero-day phishing and malware attacks using real-time threat detection and cloud-based intelligence[3][4].
    Anti-phishing protection with impersonation detection
    Identifies and quarantines suspicious emails attempting to trick users into sharing data, including impersonation of executives or trusted domains[1][3][5].
    Safe Attachments for secure file validation
    Opens attachments in a secure virtual environment to validate safety and prevent malware execution before delivery to user mailboxes[1][3][4][7].
    Safe Links for real-time URL scanning
    Scans links in emails, Teams, and SharePoint at click time to detect and block malicious URLs before users access them[3][4][7].

    Common use cases

    01

    Collaboration platform security

    02

    Email threat prevention

    03

    Employee security awareness training

    04

    Incident response and threat hunting

    Things to consider

    Every product has trade-offs, and which of them matter depends on your environment, your team and your timeline.

    Ask Picari about Microsoft Defender for Office 365

    Microsoft Defender for Office 365 pricing and integrations

    For Microsoft Defender for Office 365 integration and pricing details, ask Picari. Start a briefing with your question, such as whether it connects to your SIEM, identity provider and ticketing stack, or how it is priced at your seat count and data volume.

    Ask Picari about Microsoft Defender for Office 365 pricingAsk Picari about Microsoft Defender for Office 365 integrations

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    Profile last updated on 7 September 2026 by Picari.