KB5093998

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• [Secure Boot] ​​​​​​​

  • With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout.

  • This update adds the LimitSecureBootRequiredServiceData Group Policy and mobile device management (MDM) setting under Computer Configuration > Administrative Templates > Windows Components > Secure Boot. When enabled, Windows limits the Secure Boot service data it sends by suppressing the event normally sent to Microsoft. This policy is included in the Windows Restricted Traffic Limited Functionality Baseline. For information about the policy, see Manage connections from Windows 10 and Windows 11 operating system components to Microsoft services.  

• [Boot manager servicing update (Known issue)] Fixed: This update addresses an issue where some devices might enter BitLocker Recovery after updating boot files on systems with certain Trusted Platform Module (TPM) validation settings, including invalid PCR7 (Platform Configuration Register 7) configurations. This might occur after installing the April 2026 security update (KB5082052).

• [Country and Operator Settings Asset (COSA)] This update brings profiles up to date for certain mobile operators.

• [Device management]

  • This update improves connectivity for devices enrolled in both Microsoft Management Platform Configuration and Secure Lifecycle Device Management, helping devices reliably sync and renew their certificates.

  • This update improves reliability for dual‑enrolled devices managed by mobile device management platforms, including the Modern Management Platform Connector. It helps devices successfully sync and renew their certificates. ​​​​​​​

• [File Explorer] This update improves File Explorer search, including support for Chinese text, and UTF 8–encoded files without a byte order mark (BOM). Text now displays more clearly and consistently across search results, Content view, and tooltips.

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