Unable to create new files and folders on NAS share from HPE StoreOnce device. isFileExists

Issue

Unable to create new files and folders on NAS share from HPE StoreOnce device. May affect other windows SMB clone servers.

You see errors like the following in Windows Explorer:

Could not find this item
This is no longer located in <%3 Null:OpText>. Verify the item's location and try again.

There is a problem accessing \\server\sharename
Make sure you are connected to the network and try again.
sharename

You see errors like the following in Veeam Agent for Windows Backup log:

Error: The specified network name is no longer available. Failed to process [isFileExisits]

Cause

The Microsoft network client: digitally sign communications (always) policy setting is set to enabled

Resolution

Set the following policy to Disabled and reboot the machine.

Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options > Microsoft network client: Digitally sign communications (always)