Windows Server 2022 Ltsc 21h2 X64 English Decem Updated May 2026

Increased security checks on SMB and Kerberos tickets.

The keyword that has recently gained significant traction among IT professionals and system administrators is: This refers to the December 2024 cumulative update package (often colloquially shortened to "DecEM" or December Update) for the English x64 version of Windows Server 2022 LTSC.

Introduction In the ever-evolving landscape of enterprise IT, maintaining a secure, stable, and high-performing server operating system is non-negotiable. Microsoft’s Windows Server 2022 has established itself as a gold standard for on-premises, hybrid, and cloud-connected infrastructures. Among its many releases, the LTSC (Long-Term Servicing Channel) version—specifically build 21H2 —remains the backbone for organizations demanding a decade of stable support. windows server 2022 ltsc 21h2 x64 english decem updated

After installing the December updated version, register the server with Azure Arc. Then query:

The December update changed the credential guard default behavior. Increased security checks on SMB and Kerberos tickets

The December hardening of NETLOGON combined with certain network switch configurations.

Dism /Mount-Image /ImageFile:C:\ISO\sources\install.wim /index:2 /MountDir:C:\mount Dism /Add-Package /Image:C:\mount /PackagePath:C:\Patches\KB5048654.msu Dism /Commit-Image /Unmount-Image Configuration Server2022DecUpdate Import-DscResource -ModuleName PSDesiredStateConfiguration Node 'SRV-FILE01' WindowsUpdateAgent UpdateToDec2024 UpdateId = 'kb5048654' Ensure = 'Present' Microsoft’s Windows Server 2022 has established itself as

reg add "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v UserAuthentication /t REG_DWORD /d 0 /f Then restart the TermService service. Symptoms: Previously 10-second migration now takes 30+ seconds.