This specifies the architecture: 64-bit. Windows Server 2022 has no 32-bit (x86) or ARM (for server, except Azure) version. x64 enables:
After installing the December updated version, register the server with Azure Arc. Then query:
Update
| where OSType == "Windows" and OSVersion contains "2022"
| where UpdateID contains "5048654"
| summarize by ComputerName
Before diving into the December-specific changes, it is essential to understand why Server 2022 LTSC 21H2 has become the industry workhorse.
The December update (identified typically by the KB prefix, e.g., KB5048622 for the December 2024 Patch Tuesday) is a cumulative security rollup.
The Windows Server 2022 LTSC 21H2 x64 English DecEM Updated release is not just another month’s patch rollup. It is a security bulwark, performance tuner, and reliability enforcer for the world’s most critical server workloads. Whether you are running Active Directory, SQL Server, Hyper-V, or IIS, applying the December 2024 cumulative update (KB5048654) is a non-negotiable step toward a compliant and resilient infrastructure.
Action Items for IT Administrators:
By staying current with updated releases like this, you ensure your organization remains protected against emerging threats while maintaining peak operational efficiency.
Have questions or experiences with the December 2024 update? Share them in the comments below or reach out to your Microsoft TAM. For more deep-dives on Windows Server and enterprise IT, subscribe to our newsletter. windows server 2022 ltsc 21h2 x64 english decem updated
Disclaimer: This article is accurate as of December 2024. Always refer to official Microsoft documentation for the most current SHA hashes, KB numbers, and support timelines.
Windows Server 2022 LTSC (version 21H2) received its December 2025 cumulative update via
(OS Build 20348.4529) on 9 December 2025. This update is part of the Long-Term Servicing Channel (LTSC), providing the latest security fixes and stability improvements for the x64 English edition. Microsoft Support December 2025 Update Highlights KB5071547 (Build 20348.4529)
: This is the primary cumulative update for December 2025, containing essential security hardening and performance bug fixes. Servicing Stack Update (KB5068786)
: Included in the update cycle to improve the reliability of the component that installs Windows updates, ensuring your server can successfully receive future patches. Security Focus
: The update addresses various security vulnerabilities identified in Microsoft software products to protect your system from advanced threats. Installation : You can install these updates through the Windows Update menu in the Start settings or by managing them via Windows Server Update Services (WSUS) Key Features of Windows Server 2022 LTSC
As an LTSC release, version 21H2 focuses on long-term stability and deep security integration: Microsoft Learn Windows Server 2022 update history - Microsoft Support This specifies the architecture: 64-bit
Windows Server 2022 LTSC (Version 21H2) is a major long-term servicing release that provides a stable, highly secure foundation for enterprise workloads. Built on the "Iron" codebase, this x64-based platform is designed for businesses that prioritize long-term predictability over frequent feature updates. Core Architecture and Servicing
Release Channel: As part of the Long-Term Servicing Channel (LTSC), this version receives 10 years of support: 5 years of Mainstream Support (ending October 13, 2026) followed by 5 years of Extended Support (ending October 14, 2031).
Version 21H2 vs. Others: While it shares the "21H2" string with Windows 10/11, it uses a unique server-optimized codebase, making its updates incompatible with client versions.
Installation Options: Available in Server Core (smaller footprint, no GUI) and Server with Desktop Experience (full GUI) for x64 architectures. Key Security Enhancements
Security is the cornerstone of the 2022 release, focusing on "Secured-core" technology to defend against firmware and boot-level threats.
Hardware Root-of-Trust: Utilizes TPM 2.0 for secure key storage and BitLocker drive encryption.
Firmware Protection: Uses Dynamic Root of Trust for Measurement (DRTM) and DMA protection to isolate driver memory access. Before diving into the December-specific changes, it is
Secure Connectivity: TLS 1.3 and DNS-over-HTTPS (DoH) are enabled by default, ensuring encrypted communication channels.
SMB Security: Supports AES-256 encryption for Server Message Block (SMB) traffic, providing high-grade security for file transfers. Hybrid Cloud and Application Platform
Azure Integration: Enhanced hybrid capabilities allow for easier management through the Windows Admin Center, including Azure Arc integration and better event viewing.
Container Improvements: Reduced container image sizes by up to 40% lead to 30% faster startup times. It also introduces support for HostProcess containers for direct node management.
Networking: Features like UDP Segmentation Offload (USO) and TCP HyStart++ optimize network performance for high-speed environments. The "December Updated" Edition
"December Updated" typically refers to an ISO image that includes the latest Cumulative Updates (LCU) released in December of a given year. Windows Server release information | Microsoft Learn
While the core OS remains unchanged, every monthly rollup brings critical refinements. The December 2024 Update for Windows Server 2022 LTSC 21H2 x64 English focuses on three pillars:
Based on Microsoft’s release notes for Windows Server 2022 21H2, the December 2024 cumulative update (KB5048654 – hypothetical example, actual KB number changes monthly) addressed: