Windows Server 23H2 build 25398.1849 — release notes, downloads, known issues

Windows Server, version 23H2 (25398.1849)

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Fix Windows 11 23H2 Release Preview: Build 22631.5982 Reliability Fixes Sep 11, 2025 · Windows Server 23H2 coverage from this build's release window
Fix Windows 11 23H2 KB5065431 Sep 2025 Update: NDI, UAC, SMB Fixes Sep 10, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage Windows 11 23H2 September 2025 Preview KB5065790 and Secure Boot certificate rollover Sep 23, 2025 · Windows Server 23H2 coverage from this build's release window
Fix KB5065790 Windows 11 23H2 Preview Fixes SIM PIN Sign‑in RDP IME and SMBv1 Sep 24, 2025 · Windows Server 23H2 coverage from this build's release window
Fix KB5065790 Windows 11 23H2 Preview: Reliability Fixes Ahead of EOL Sep 24, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage Windows 11 23H2 KB5065790 Preview: Targeted Reliability fixes and SMBv1 mitigation Sep 28, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage Windows 11 23H2 End of Servicing 2025: Upgrade to 24H2 or 25H2 Now Oct 10, 2025 · Windows Server 23H2 coverage from this build's release window
Coverage Windows 11 23H2 End of Support — Upgrade to 24H2 or 25H2 by Nov 11, 2025 Oct 10, 2025 · Windows Server 23H2 coverage from this build's release window

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