Hello, Could you please provide a secure file exchange so that I can share the requested network trace.
Regards, Kacper On Thu, 4 Dec 2025 at 03:48, Sreekanth Nadendla <[email protected]> wrote: > Hello Kacper, thanks a lot for clarifying the background. Can you capture > network trace showing SMB traffic between client and the server please. > > Regards, > > Sreekanth Nadendla > > Microsoft Windows Open Specifications > > > ------------------------------ > *From:* Kacper <[email protected]> > *Sent:* Wednesday, December 3, 2025 4:51 AM > *To:* Sreekanth Nadendla <[email protected]> > *Cc:* [email protected] <[email protected]> > *Subject:* Re: [EXTERNAL] [cifs-protocol] Windows 11 does not appear to > apply group policies on logon when Hardened UNC paths are configured > > Hello, > > Thank you for the response. I understand the distinction you’re making > regarding product configuration, but I believe the issue may actually stem > from an interoperability problem between Windows 11 and Samba. It seems > possible that recent changes in either MS-SMB2 or MS-KILE within Windows 11 > could be affecting how hardened UNC paths and logon authentication behave. > > From what I’m seeing, this may represent a regression in how Windows 11 > handles UNC paths requiring mutual authentication, potentially due to > additional security hardening introduced in the newer OS. > > Additionally, Microsoft customer support has been unwilling to provide > further assistance, as I was informed that this falls outside their support > boundaries. > > Regards, > Kacper > > On Wed, 3 Dec 2025 at 03:08, Sreekanth Nadendla <[email protected]> > wrote: > > Dochelp in Bcc > > Hello Kacper, > > It seems you are not actually implementing SMB protocol. Interoperability > Documentation Help mail is meant for obtaining support for the Open > Specifications documentation. You can read about the Microsoft Open > Specifications program from > http://www.microsoft.com/openspecifications/en/us/default.aspx > > The library of Open Specification documents can be accessed from > http://msdn.microsoft.com/en-us/library/dd208104(PROT.10).aspx > > Based on the description of your issue, it appears to be related to > product configuration rather than protocol specific. You can reach out to > Microsoft platforms product support team for assistance on this issue. > Below are some resources that provide contact information and explain > various methods of obtaining support. > > > Microsoft Q&A | Microsoft Learn > <https://learn.microsoft.com/en-us/answers/> > > > https://support.serviceshub.microsoft.com/supportforbusiness/onboarding?origin=/supportforbusiness/create > > > > Regards, > > Sreekanth Nadendla > > Microsoft Windows Open Specifications > > > > > -----Original Message----- > From: Kacper <[email protected]> > Sent: Tuesday, December 2, 2025 3:52 PM > To: Interoperability Documentation Help <[email protected]> > Cc: [email protected] > Subject: [EXTERNAL] [cifs-protocol] Windows 11 does not appear to apply > group policies on logon when Hardened UNC paths are configured > > > > Some people who received this message don't often get > email from [email protected]. Learn why this is important < > https://aka.ms/LearnAboutSenderIdentification> > > > > Hi dochelp, > > > > In my testing, Windows 11 does not appear to apply Group Policy at logon > when Hardened UNC Paths are configured with RequireMutualAuthentication=1 > (Computer Configuration → Administrative Templates → Network → Network > Provider → Hardened UNC Paths). The same configuration works without any > issues on Windows 10. > > > > It seems that access to the SYSVOL share fails during logon. Event Viewer > reports error 2148073478 / Invalid Signature for the SYSVOL UNC path. > > > > Could you assist me in determining the cause of this error? > > > > Regards, > > Kacper > >
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