Microsoft Security September 2026: Purview network DLP, Priority Cleanup, eDiscovery, and Intune for GCC High

Microsoft's September 2026 security roundup adds a Security Copilot detonation summary to Microsoft Defender for Office 365 and network-level data loss prevention (DLP) through Microsoft Purview and Microsoft Entra Global Secure Access. Purview also gains larger auto-labeling simulations, eDiscovery support for user-owned SharePoint Embedded containers, file-level archiving, and permanent deletion with Priority Cleanup. In addition, Intune Remote Help, Enterprise Application Management, and Microsoft Cloud PKI are coming to GCC High. This article explains the requirements, configuration steps, and limitations of each feature. Source

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