Microsoft will block mobile devices using Exchange ActiveSync versions below 16.1 from accessing Exchange Online starting March 1, 2026. This change affects native email apps but not Outlook Mobile users or on-premises Exchange servers. Device updates are necessary to maintain connectivity.

Microsoft is rolling out new Secure Boot certificates through Windows updates to replace the original ones expiring in June 2026. This update enhances security by ensuring that only trusted software can load during startup. Devices on unsupported Windows versions won’t receive these updates and will enter a "degraded security state."

Microsoft issued out-of-band updates to fix two critical issues affecting Windows 10, Windows 11, and Windows Server. One problem disrupts remote desktop access to Microsoft 365 Cloud PC sessions, while the other prevents some Windows 11 devices with Secure Launch from shutting down or hibernating.

Microsoft addressed a problem where third-party security software falsely flagged WinSqlite3.dll, a core Windows component, as vulnerable. The company updated the DLL in January 2026, encouraging users to install the latest updates for their devices. This issue affected both Windows 10 and 11, as well as Windows Server versions 2012 to 2025.

Microsoft has resolved a boot issue affecting Linux on dual-boot systems with Secure Boot enabled after the August 2024 Windows security updates. The problem stemmed from an incorrectly applied Secure Boot Advanced Targeting update, which has now been fixed in the May 2025 Patch Tuesday updates. Users are advised to update their devices to incorporate this resolution.

Microsoft has confirmed a significant issue with Windows Server Update Services (WSUS) that is preventing organizations from successfully syncing with Microsoft Update to deploy Windows updates. The problem is attributed to a faulty update revision, and while Microsoft is currently working on a fix, no workarounds are available at this time. An update later confirmed that a server-side fix has resolved the issue.

Microsoft has issued a warning about blue screen crashes caused by secure kernel fatal errors following updates released since March for Windows 11, version 24H2. Affected users may encounter the error code 0x18B after installing updates and restarting their devices, but a Known Issue Rollback (KIR) will automatically resolve the issue for most users within 24 hours. Windows admins for enterprise-managed devices will need to manually apply a Group Policy to address the problem.

Microsoft is reportedly unveiling new icons for its Office suite, aiming to modernize the visual identity of its applications. The updated icons are designed to enhance clarity and consistency across the Office platform, reflecting a more contemporary aesthetic. Early previews suggest a focus on simplicity and a cohesive color palette.

Windows 11 users should be aware that restore points will now be retained for only 60 days following the June 2025 update, down from the previous 90 days. This change applies to the current version 24H2 and future updates, necessitating more frequent management of system restore points to ensure recoverability after outages. Instructions for creating a restore point are also provided.