Error accessing SMB share

UCS - Univention Corporate Server
1

Hi
I am having intermittent problems accessing SMB shares from a non-domain Windows 10 laptop.
I have been using the UMC management console from my master domain controller to create the shares.
All shares have been created on either DC Backup or DC slaves with Samba 4 installed.

  1. Sometimes (intermittently) all servers are publishing all shares on my Windows machine. Other times not or just the odd one.
  2. For most parts I do get “Network path was not found” trying to access the share but not always.
  3. Other times Windows recognizes the share but I cannot login “Invalid credentials”.
  4. Using a test environment with DC and backupDC worked perfectly but from earlier experience this might change without intervention.
  5. Testing from a Ubuntu, the client acknowledge all shares and I am consistently able to login to the shares using SMB://

There is no rime or reason behind the behavior and I cannot tell if the error is with Windows 10 or UCS.
How can I start to troubleshoot this? I am at loss here.

Regards Bengt

2

Solved
It turned out to be a Windows10 issue that caused this rather erratic problem.
Changed \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters
RequireSecuritySignature was set to 1 changed it to 0 and it all started to work.
Searching for solutions on internet suggested setting the value 1 which it was already set to, this did throw me of for a while.
However it is now all working.

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