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Those in the Canary Channel can now download Windows 11 Insider Preview Build 25381.

The update includes a change to Server Message Block (SMB).

Windows 11 Update in Settings app

The protocol now requires signing in by default on all connections.

This is part of a campaign to improve the security of Windows and Windows Server for the modern landscape.

All versions of Windows and Windows Server support SMB signing.

Binary code displayed on a laptop screen and Guy Fawkes mask are seen in this illustration photo.

But a third-party might disable or not support it.

Build Build 25381: Changes and Improvements

General

Windows Update

Windows Updates

Windows 11 Official

Windows 11 OOBE sign-in

Kevin Addley, VP Marketing & Growth at Future photographs a BSOD at JFK airport

Windows 11 system features

Windows 11 Start menu

Windows 11 battery usage

Copilot Vision for Windows announcement

Monument Valley image

Diablo 4 Season 7 Season of the Witch

Marathon gameplay reveal

U.S. President Donald Trump speaks during the United Nations General Assembly seen on a laptop computer in Hastings on the Hudson, New York, U.S., on Tuesday, Sept. 22. 2020.

Lenovo IdeaPad 5x 2-in-1 deal

Promotional screenshot of characters from Zenless Zone Zero