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Microsoft-Sentinel

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Microsoft Sentinel and Defender Experts Add Multi-Cloud MDR Coverage

Microsoft Sentinel and Defender Experts Add Multi-Cloud MDR Coverage

FIRST LOOK ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 6.5 Microsoft Security Blog

Microsoft's August 2026 security update extends Defender Experts MDR to third-party data sources ingested via Sentinel — including Palo Alto Networks, AWS, and Okta — and introduces Entra Tenant Governance for centralised multi-tenant visibility and drift monitoring. These additions close a meaningful gap for organisations running hybrid or multi-cloud environments, where managed detection historically stopped at Microsoft-native telemetry boundaries. Realising the full benefit requires P2 licensing, mature Sentinel ingestion pipelines, and organisational readiness to act on cross-tenant configuration drift alerts.

Microsoft 365 Copilot Prompt Injection Threats in Enterprise

Microsoft 365 Copilot Prompt Injection Threats in Enterprise

ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 6.5 Microsoft Security Blog

Microsoft has released a structured investigator playbook for reconstructing AI-related activity across Microsoft 365 Copilot and Azure AI services, addressing the challenge of converting raw telemetry into coherent incident timelines. The playbook targets threats already observed in enterprise deployments, including prompt injection attempts and unauthorized data access, and operationalizes a scope–context–signal methodology across Purview, Defender, and Sentinel. This guidance directly supports security teams responding to AI-specific incidents where unstructured telemetry has previously hindered attribution and impact assessment.

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