Defender for Office 365 Plan 1 offers protection against advanced cyberattacks across email and collaboration tools in Microsoft 365.

October 30, 2025 - Defender for Office 365 365 Plan 1: Included in some Microsoft 365 subscriptions that cater to small to medium-sized businesses (for example, Microsoft 365 Business Premium).

October 28, 2025 - For enhanced email protection, Microsoft Defender for Office 365 (MDO) provides advanced security services for Office 365 services and is the primary email security solution. MDO is offered in two plans, Plan 1 and Plan 2, to protect organizations of various sizes.

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May 20, 2025 - Integration with Broader Security Ecosystem: Many SMBs are adopting Microsoft 365 Business Premium, which includes Defender for Office 365 P1 and Defender for Business for endpoints. By moving to P2, an SMB gains XDR (extended detection & response) integration – meaning email threats can be correlated with endpoint signals, cloud app alerts, etc., in the Microsoft 365 Defender portal ... . This holistic view is usually found in enterprise setups; Plan 2 brings it to SMBs, enabling enterprise-grade visibility into multi-faceted attacks (e.g., detecting if a phishing email led to malware on a device, and seeing that in one incident report).

March 15, 2023 - Real-time detection—Defender P1 lets you see threats in real-time and can integrate with a SIEM. The following security features are offered in the basic Office 365 license, and also available as part of Plan 1:

Secure your Office 365 environment with Microsoft Defender Plan 1 GCC - advanced threat protection, email security, and compliance tailored for government users.

Defender for Office 365 Plan 1 offers protection against advanced attacks across email and collaboration tools in Office 365. Protection against advanced attacks, such as phishing, malware, spam, and business email compromise · Protection beyond ...

May 26, 2022 - Microsoft Defender for Office 365 ... that has an Exchange Online mailbox license. In short, it's the basic security package you receive with a Microsoft 365 mailbox....

September 13, 2025 - If you’re on Defender for Office 365 Plan 1 (MDO P1), you already have a strong toolkit—as long as it’s configured well. This guide turns the knobs for you: what to enable, what to avoid, and how to keep users safe without drowning your helpdesk. Turn on Preset Security Policies and target them by risk: Strict → executives, finance, IT, and anyone historically targeted ... Presets apply Microsoft’s recommended settings across EOP + MDO and keep them updated automatically.

Modern email protection techniques such as Safe Links and Safe Attachment, complementing the defense of Exchange Online Protection to protect mailbox

May 12, 2025 - Microsoft Defender for Office 365 Plan 1 — contains EOP and offers extended detection and response.

Buy Microsoft Defender for Office 365 Plan 1 - Essential email and collaboration security. ✅ Lowest price for Microsoft licenses

Explorer (Threat Explorer): Defender for Office 365 Plan 2 only. Defender for Office 365 Plan 1 has Real-time detections instead.

Protect email from phishing attacks powered by AI-powered language models using Microsoft Defender for Office 365

Buy a Microsoft Defender for Office 365 Plan 1 - subscription license (1 month) - 1 user or other Application Suites at CDW.com