I ran into this issue the other day with a new HPE StoreOnce deployment. When attempting to connect to a CIFS share on a StoreOnce appliance (it does matter if it is physical appliance or VSA) from a Windows 2012 R2 server, the following error is received “The account is not authorized to log in from this station”.
To fix this, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters and set RequireSecuritySignature = 0 and then reboot Windows. When Windows comes back up, you should now be able to browse the CIFS share on the StoreOnce appliance.
Bookmarking this post to my quick tips. Trying to remember where to navigate to is difficult to remember.
Excellent resource site Dean!
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