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4 September 2026Doc update+1 / −2 lines

In brief

The Windows 21H2/SV1 row retains the requirement for build 22000.593 or later, but its Microsoft Update Catalog link now points to KB5011563.

What Defender admins need to know

Use the corrected link when locating the documented update.

Summaries are generated from the documentation change itself.

Documentation change

View full page diffView on Microsoft Learn

The comparison below shows only the changed extract. Use the full-page view for complete context.

  |Semester/Redstone|OS version|Release|
  |:---|:---|:---|
  | 21H2/SV1|`22000.593` or later|[KB5011563: Microsoft Update Catalog](https://www.catalog.update.microsoft.com/Search.aspx?q=KB5019275)KB5011563) |
  | 20H1/20H2/21H1|`19042.1620` or later<br/> `19041.1620` or later<br/> `19043.1620` or later|[KB5011543: Microsoft Update Catalog](https://www.catalog.update.microsoft.com/Search.aspx?q=KB5011543) |
  | Windows Server 2022 or later|`20348.617` or later|[KB5011558: Microsoft Update Catalog](https://www.catalog.update.microsoft.com/Search.aspx?q=KB5011558) |
  | Windows Server 2019 (RS5)|`17763.2746` or later |[KB5011551: Microsoft Update Catalog](https://www.catalog.update.microsoft.com/Search.aspx?q=KB5011551) |