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A security team wants to implement zero-day protection for email attachments. Which Defender for Office 365 feature provides this by detonating attachments in a sandboxed virtual environment?
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Alex
Safe Attachments in Microsoft Defender for Office 365 provides zero-day protection by detonating email attachments in a sandboxed virtual environment before delivery. The attachment is opened in a controlled VM where behavior is analyzed for malicious activity. Policy actions include Block (quarantine malicious attachments), Replace (deliver email without the attachment), and Dynamic Delivery (deliver email body immediately, reattach after scan completes). This catches malware that signature-based scanning cannot detect. Safe Links is a separate feature that protects against malicious URLs, not attachments. Anti-spam filtering and DLP policies do not provide sandbox detonation. Dynamic Delivery minimizes end-user delay while maintaining protection. Ref: learn.microsoft.com/microsoft-365/security/office-365-security/safe-attachments-about
Sourcelearn.microsoft.com
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