rdr_file_system 0x27 BSOD After Windows 10 2004 update, but only on domain profiles

Anonymous
2020-06-08T14:50:36+00:00

Good morning, I am having an issue on some PCs recently after some PCs received the Windows 10 2004 build update. After receiving said update, the machines will BSOD with a 0x027 error code when logging into a domain profile while connected to the network.

If I remove the network cable from the PC and log into a domain account that was cached on the machine before the update, it will log in without issues and then I can connect it to the network and it seems to resume function. I can also sign into a local account on the machine, with and without network connectivity. 

I used Bluescreen View to look at the dumps which seem to be showing rdbss.sys and mrxsmb20.sys as drivers that are causing the issue. I have tried updating network drivers etc from the vendors websites and not relying on Windows to, but am still having the issue.

The other bizarre thing is if the PC crashes 3 times, boots into the recovery mode to try and repair your PC and I restart it, it will then log in once to a domain account and seem to be functioning, however if the PC is restarted it will BSOD on log in.

Has anyone seen or heard of any issues like this since this update? Could it be something out dated on the server that is causing the issue to happen to the machines on the newer OS? I can't help but feel like it has something to do with folder redirection and that is why cached accounts will work with no network connection however I am stumped how to get around this other than not updating every other machine, and rolling back if possible (I had a PC that was upgraded from Windows 7 to 10 and went straight to the 2004 build and BSOD'd, I tried to roll back to Win7 and system will not boot at the moment saying it is missing system files etc.).

I have some mini dumps I can share if that would help as I would like to get to the bottom of this if possible.

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2021-02-12T09:57:57+00:00

    We're rolling out the ProviderFlags registry fix to our 1909 machines, so when they update to 20H2 they don't bluescreen before the CU installs. Horrible state of affairs that MS have put is in as we have 3000+ machines all with offline files enabled.

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  2. Anonymous
    2021-02-22T11:50:32+00:00

    Still occurring in 20H2.

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  4. Anonymous
    2021-03-05T16:43:11+00:00

    I've just come back to looking at this issue on a test machine, Currently running Win10 20H2 build 19042.844.

    I can see all my mapped drives (Mapped via bat file on logon script profile setting) without offline files enabled, and with it enabled, but no folders available offline.

    Once I make a drive/folder available offline, windows will no longer be able to see any other mapped drives on the same server.

    File share example \DOMAIN.NAME.LOCAL\San01\Home#UserName

    If I make my home folder available offline, I can then no longer view other home folder for other users. Nor can I see other shares in the San01 folder.

    This becomes a big issue for us as we have a handful of folders inside the San01 section, which most aren't made available offline for people who need offline files.

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  5. Anonymous
    2021-03-05T23:48:23+00:00

    The workaround for this is as follows replace the drive letter in my case Z with whatever your using for offline files.

    For me documents folder is redirected to a file server and mapped as Z drive.

    Save the below in a .reg file and import under the user which is afffected.

    Windows Registry Editor Version 5.00

    [HKEY_CURRENT_USER\Network\z]

    "ProviderFlags"=dword:00000001

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