> The funny thing is you can enter or list the "hidden" folder if your
force the path.

The bug has been confirmed and there are explanations and patches but
the maintainers don't seem ready to apply it which is unfortunate as it
is a very nefarious bug (Windows 10 doesn't support SMB1.0 by default).
If you aren't aware of this bug you could mistakenly think all files of
a share are being backed up when they aren't.

https://bugzilla.samba.org/show_bug.cgi?id=13107

https://www.spinics.net/lists/linux-cifs/msg14170.html

Explanation of bug:
https://www.spinics.net/lists/linux-cifs/msg14405.html

Unfortunately I'm not sure how to apply the patches and recompile just
the cifs module.

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https://bugs.launchpad.net/bugs/1572132

Title:
  SMB driver (SMBv2) does not show all files when mounting a windows top
  level share

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When using the SMBv2 Protocol to mount a top level windows share (such
  as C:\) not all files (or directories) are shown that exist  on the
  server side. Exactly 2 files are always missing...

  Steps to reproduce:
  On a windows7 PC (or Server) e.g. C:\ must be published as Share (must be top 
level share - a subfolder like C:\data\ seems to work)

  sudo mount -t cifs //SERVER/SHARE_NAME /mnt -o
  domain=DOMAIN_NAME,username=${USER},uid=1000,gid=1000,nounix,vers=2.0

  As a result always 2 Files (or directories) are missing in the mounted
  directory of the ubuntu installation.

  Seems to be a kernel bug (source tree: linux/fs/cifs).

  The ubuntu versions I have checked:
  Ubuntu 14.04LTS amd64
  Ubuntu 15.10 amd64
  Ubuntu 16.04 amd64

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.12
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue Apr 19 14:50:02 2016
  InstallationDate: Installed on 2016-04-19 (0 days ago)
  InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160417.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)

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