Windows Server 23H2 build 25398.2025 — release notes, downloads, known issues

Windows Server, version 23H2 (25398.2025)

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Coverage KB5071417 Windows 11 23H2 December Rollup Adds PowerShell Confirm Prompt Dec 9, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage KB5072543 Safe OS Dynamic Update Refreshes WinRE for Windows 11 23H2 Dec 9, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage KB5071416 Setup Dynamic Update for Windows 11 23H2 — Admin Guide Dec 9, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage KB5073454 Safe OS Dynamic Update for Windows 11 23H2: WinRE Refresh Guide Jan 13, 2026 · Windows Server 23H2 coverage from this build's release window
Coverage KB5074208 Setup Dynamic Update in Windows 11 23H2: Deployment guidance for IT pros Jan 13, 2026 · Windows Server 23H2 coverage from this build's release window
Issue Windows 11 23H2 Shutdown Restart Bug in January 2026 Update KB5073455 Jan 16, 2026 · Windows Server 23H2 coverage from this build's release window
Issue Windows 11 23H2 Shutdown Bug After January 2026 Patch Tuesday (Secure Launch) Jan 16, 2026 · Windows Server 23H2 coverage from this build's release window
Issue Windows 11 23H2 Shutdown Regression with Secure Launch (KB5073455) Jan 16, 2026 · Windows Server 23H2 coverage from this build's release window

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