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​​​​​​​​What’s new in Microsoft Security: September 2026​​

AI agents are now running on employee devices, cloud platforms, and across developer workflows. The real value of this story is that it touches operational safety, not just another settings layer.

AI agents are now running on employee devices, cloud platforms, and across developer workflows. Security teams need to see those agents, govern what they can reach, and contain them when something goes wrong. The useful part sits in the context, the practical impact, and what readers can use to decide the next step.

​​​​​​​​What’s new in Microsoft Security: September 2026​​

AI agents are now running on employee devices, cloud platforms, and across developer workflows. Security teams need to see those agents, govern what they can reach, and contain them when something goes wrong.

What changed

This month’s updates help you discover and control local AI agents, extend Zero Trust to agent traffic, and strengthen the security operations center (SOC) foundations that AI-era operations depend on.

Price and bundle value

Bring more context into email investigation and hunting with Microsoft Security Copilot Available for organizations using both Microsoft Defender and Microsoft Security Copilot , a new email detonation summary delivers AI-generated explanations of URL and file sandboxing results, helping SOC teams investigate faster by reducing the manual effort required to correlate detonation evidence and contextual signals.

AI features that change the value

Prevent employees from sharing proprietary or sensitive organizational data to potentially risky locations such as consumer AI apps. Protect, investigate, and clean up enterprise data with Microsoft Purview Manage labeling at enterprise scale with less administrative overhead Microsoft Purview auto-labeling helps organizations automatically apply data security controls to sensitive content at enterprise scale. New auto-labeling enhancements improve policy scale, admin experience, and reporting. Policies now support simulations of up to 20 million items and up to 50,000 sites through adaptive scopes. Administrators can edit a policy without re-running simulation. New audit insights and reporting show policy coverage and processing activity.

Who should pay attention

With Microsoft Purview Data Lifecycle Management, administrators can now archive inactive SharePoint content without archiving the entire site. Archived content remains subject to retention and legal hold policies, and remains discoverable for eDiscovery, while dropping out of Microsoft 365 Copilot indexing (until reactivated). Organizations can also use Priority Cleanup to permanently delete approved content, including stale Teams recordings and transcripts, so it is no longer discoverable in eDiscovery, SharePoint search, or Microsoft 365 Copilot. Together, these capabilities help organizations meet compliance regulations, including those in highly regulated industries.

Patrick Tech Media take

Microsoft Intune Enterprise Application Management , Microsoft Cloud PKI , and Intune Remote Help are coming to Government Community Cloud with High security needs (GCC High), with Enterprise Application Management also being offered to organizations of the Department of Defense (DoD). These capabilities help government and defense organizations simplify application management, modernize certificate lifecycle management, resolve device issues faster, and reduce total cost of ownership, all while operating within their accredited cloud environment.

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