Microsoft 365 Defender security is a cloud-based cybersecurity service offered by Microsoft and designed to protect Office 365 (now Microsoft 365) users.

Microsoft 365 Defender protects an enterprise's emails and Office 365 resources.

Generally, Microsoft 365 Defender is a unified pre- and post-breach enterprise cybersecurity defense suite that can be used by small and medium-sized businesses.

The goal of Microsoft 365 Defender is to provide integrated threat protection against malware and sophisticated attacks.

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