A family of Microsoft relational database management systems designed for ease of use.
I agree that it is regrettable that we are not given at least a response by Microsoft. I have found so far that the change recommended to the Windows 10 client PCs as follows seems to have fixed the problem. I have been forced to implement this and move on while waiting for an official response. Disable leasing on the server has also worked.
Windows Registry Editor Version 5.00[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters]"FileInfoCacheLifetime"=dword:00000000"FileNotFoundCacheLifetime"=dword:00000000"DirectoryCacheLifetime"=dword:00000000****