Windows 10 1803 update breaks file-sharing access and viewing of large number of files in shared folder

The organization I work at uses a CRM application that requires access to a central file server to access large number of files.

After 1803 was installed and set-up on the workstations, we encountered weird issues with loading of file attachments to each ticket in a very-extremely-painfully slow manner.

Doing some searches on the internet resulted in the following info -

• https://social.technet.microsoft.com/Forums/en-US/8e468316-c70f-4270-8778-c30215b7d3f3/network-folders-slow-after-windows-10-1803-update?forum=win10itpronetworking
• https://community.spiceworks.com/topic/2135698-network-share-performance-of-windows-10-1803
• https://partnersupport.microsoft.com/en-us/par_clientsol/forum/par_win/network-folders-slow-after-windows-10-1803-update/5c622107-46d5-43b3-a98c-9ae480968e77

The summary of the fix is to go into registry editor and insert the following DWORD(32bit) values into the key -

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters]

values -
"DirectoryCacheLifetime"=dword:00000000
"FileInfoCacheLifetime"=dword:00000000
"FileNotFoundCacheLifetime"=dword:00000000

Once these values are added, browsing of files on the file server and extraction of attached files within our CRM are sped-up like there's no tomorrow!

Hope this helps some of us out there!

Interesting trivia - LANMan (LAN Manager) is the same application used to display folder structure/contents in a GUI environment before Explorer.exe (Windows Explorer) came into existence. This tool/software is theoretically in use since Windows 3.1! :)