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Windows Server 21H1 builds — every release, with permalinks

Every Windows Server 21H1 build in order, newest first: retail cumulative updates, Release Preview and Insider flights, each with its own permanent page, downloads and forum coverage.

Windows Server 21H1 builds

Version lines: 2025 · 2022 · 2019

Cumulative Update for Windows Server 2019 (21H1) (19043.867) · v19043.867 · 2021-03-10T10:58:30+00:00
Cumulative Update Preview for Windows Server 2019 (21H1) (19043.844) · v19043.844 · 2021-02-17T22:20:55+00:00

The interactive tracker — with filters, search, and AI-generated build summaries — requires JavaScript and replaces this list when it loads.

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