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I completely screwed up. Recently, due to some mishandling, I reset the security descriptors on a file share…
Thank goodness, it's fairly easy to restore security descriptors with the Icacls command and a full backup.
Personally, I restored the security descriptors from a windows snapshot (and with the very good dosdev utility: http://www.ltr-data.se/) but you can do it from a standard backup.
If, like me, you want to use a Windows snapshot, first mount the backup as a drive letter, save the security descriptors in a file with Icacls, then restore the security descriptors.
Here we'll look at how to mount a snapshot as an H: drive.
PS C:\> vssadmin list shadows /for=D:
PS C:\> .\dosdev.exe H: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy3
PS C:\> H:
PS H:\> cd .\Share\
PS H:\> icacls 01-Admin /save c:\BACKUPACL_01-Admin /T /C
PS H:\> icacls 02-Softwares /save c:\BACKUPACL_01-Softwares /T /C
PS H:\> icacls 03-Temp /save c:\BACKUPACL_03-Temp /T /C
PS H:\> cd D:\Share
PS D:\> icacls .\ /restore c:\BACKUPACL_01-Admin /T /C
PS D:\> icacls .\ /restore c:\BACKUPACL_02-Admin /T /C
PS D:\> icacls .\ /restore c:\BACKUPACL_03-Admin /T /C
PS D:\> .\dosdev.exe H: /D
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