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highDefenderMicrosoft Defender for Office 365new featurem365_message_center · Jul 9, 2026

Microsoft Defender for Office 365: Prompt injection protection for email

Microsoft Defender for Office 365 now includes prompt injection protection for email, detecting and blocking malicious content that attempts to manipulate AI assistants. This enhancement helps protect enterprise data from sophisticated phishing attacks targeting AI systems.

Services: Microsoft Defender XDR. <p><b>[What and Why]</b></p><p>We are introducing prompt injection protection for email in <i>Microsoft Defender for Office 365</i>. This capability detects and blocks malicious prompt injection content embedded in email messages that attempt to manipulate AI assistants and agents. I…
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Security
threat_protectionendpoint_security
Audience
adminsecurity_engineer
Environment
cloud
Ontology Topics
AZ-500
Classification confidence: 95%
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Microsoft Defender for Office 365: Prompt injection protection for email | 365Forge