Microsoft released Windows Admin Center version 2511 on December 11, 2025, restoring support for high availability deployments and delivering broad updates across deployment, virtualization, and security. The release enhances core management workflows, introduces a new VM conversion tool alongside the NetApp Shift Toolkit for cross-hypervisor migrations, and brings notable security improvements together with expanded international keyboard support for remote desktop connections.

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Microsoft released significant updates to Intune in December 2025, focusing on workflow automation, cross-platform enhancements, and improved security controls. The updates introduce a centralized admin task view, enhanced Android privacy controls, and customizable iOS enrollment experiences.

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Microsoft Entra PowerShell is a module that lets administrators manage and automate Microsoft Entra ID resources—such as users, groups, applications, and policies—via PowerShell, built on and interoperable with the Microsoft Graph PowerShell SDK. ​Microsoft released version 1.1.0 of the Entra PowerShell module, introducing compatibility improvements and new filtering parameters for device and service principal management. The update removes version restrictions for Microsoft Graph PowerShell and adds functionality for administrators managing identity resources.

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Microsoft announced that advanced Intune Suite capabilities will be included in Microsoft 365 E3 and E5 subscriptions at no additional cost, expanding endpoint management and security features to more organizations. The changes take effect in 2026 and aim to help IT teams manage devices at scale while strengthening Zero Trust security.

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Installing a new .NET version does not automatically uninstall older versions, meaning outdated End of Life runtimes can remain on systems indefinitely. These unsupported versions pose serious security risks as they no longer receive patches for newly discovered vulnerabilities. Microsoft ceased support for .NET Framework 4.5.2, 4.6, and 4.6.1 on April 26, 2022, leaving systems running these versions exposed to exploitation and compliance violations. Administrators must actively identify applications using End-of-Life runtimes and coordinate with development teams to migrate them to supported versions. This article explains how to inventory, assess dependencies, and safely remove outdated .NET Framework installations from Windows systems.

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Microsoft announced Baseline Security Mode at Ignite 2025, a new security capability that provides an opt-in security baseline for Microsoft 365 tenants. The feature shifts critical protections from optional configurations to a secure-by-default model that administrators can choose to enable, helping organizations meet minimum security standards when they opt into the feature.

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Microsoft announced price increases for Microsoft 365 and Office 365 commercial subscriptions. The new list prices will go into effect on July 1, 2026, though existing customers will generally not pay the higher rates until their next renewal after that date. The company justifies the changes by pointing to more than 1,100 new features added across the platform, particularly AI-powered capabilities, security enhancements, and device management tools.

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Microsoft introduced a Common Vulnerabilities and Exposures (CVE) report within Windows Autopatch, providing security teams with consolidated visibility into Windows vulnerabilities, patch status, and affected devices across their organization. The feature integrates vulnerability tracking directly into the Microsoft Intune admin center alongside existing Windows quality update reports.

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Microsoft has expanded the Windows 11 version 25H2 rollout in December 2025, entering a new phase of broad deployment for eligible devices, though it is not yet available on every device simultaneously. The update, which uses machine learning to determine when to offer the upgrade to eligible devices, continues to be rolled out gradually.

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Microsoft released Windows 11 Insider Preview Build 26220.7344 (KB5070316) to the Dev and Beta Channels on December 5, 2025, delivering native support for the Model Context Protocol, the Unified Update Orchestration Platform, and Windows MIDI Services. The update also includes improvements to Quick Machine Recovery and the "Open With" dialog, as well as fixes for File Explorer, Windows Hello, and system stability issues.

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Microsoft's optional KB5070311, a preview update for Windows 11 versions 24H2 and 25H2 with several new features, has caused multiple issues affecting File Explorer's dark mode, installation stability, and compatibility with Intel Arc graphics cards. Released on December 1, 2025, the update was designed to enhance dark mode consistency, but instead created a problematic user experience for many Windows 11 users.

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Microsoft released KB5070311 on December 1, 2025, the final non-security preview update for Windows 11 versions 24H2 and 25H2 in 2025. The update delivers AI-exclusive features for Copilot+ PCs, introduces Virtual Workspaces for system management, and enhances File Explorer's dark mode experience.

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A known bug in Windows 11 causes the password icon to become invisible or missing from the lock screen sign-in options after installing specific Windows updates released since August 2025. Although the button remains functionally available, it is not visible to users, requiring them to hover over a blank space to access the password field.

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In a previous blog post, I reviewed the new features of Proxmox VE 9.0. Proxmox VE 9.1 arrives with several impactful upgrades, including the ability to create LXC containers directly from OCI images, eliminating the need for separate LXC templates. The release also introduces qcow2-based TPM state storage for fully snapshot-friendly vTPM setups and adds granular nested-virt CPU flag control for more flexible virtualization. Alongside an improved SDN interface and core component updates, these enhancements significantly reduce admin friction and streamline VM and container management.

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Agent Workspace is an experimental feature in Windows 11 that creates a separate, contained environment where AI agents can operate autonomously in the background. Microsoft is introducing this capability as part of its vision to transform Windows 11 into an AI-native operating system, allowing AI to perform complex tasks while users continue their regular work uninterrupted.

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Microsoft is working to resolve an issue that prevents users from opening Excel email attachments in the new Outlook client when the filenames contain non-ASCII characters. The bug affects Exchange Online customers and displays an error message that reads, "Try opening the file again later."

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Microsoft is integrating app updates directly into Windows Update settings in preview builds of Windows 11, allowing users to keep applications up to date without launching the Microsoft Store. The new feature appears as an "App updates" page within Settings > Apps, designed to provide an alternative update mechanism for environments where the Microsoft Store is unavailable or restricted.

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OPNsense firewalls can also function as DHCP servers. IP addresses are then assigned directly at the point where network separation and packet filtering take place. The firewall manages all active hosts, controls their assignment to VLANs and segmented networks, and documents each allocation in its own lease tables.

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Microsoft will retire the legacy Windows Internet Name Service after Windows Server 2025, strongly encouraging organizations to transition to DNS by November 2034.

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