With this new option, an administrator can intentionally block Windows from offering NTLM via SMB. NTLM in this case refers to all versions of the LAN Manager security package: LM, NTLM, and NTLMv2. This changes legacy behavior, where Windows SPNEGO would negotiate Kerberos, NTLM, and other mechanisms with the destination server to decide on a supported security package. Starting with this build (Build 25951), the SMB client now supports blocking NTLM for remote outbound connections. What’s new in Build 25951 SMB NTLM Blocking Please note that we will not publish a blog post for every flight – only when new features are available in a build. REMINDER: As builds released to the Canary Channel are “hot off the presses,” we will offer limited documentation for builds flighted to the Canary Channel including documenting only the most significant and highly impactful known issues.
We are releasing ISOs for this build – they can be downloaded here. Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 25951 to the Canary Channel.
