Help with UNC file group

What you propose makes sense. However, I am failing to add permissions to the temp processing folder for the “admin” group on the FreeNAS server because the server is not recognized as a valid windows network machine. In other words, it does not show up as a computer under “network” in Windows Explorer. And when I try do add security permissions for the group, I cannot select the server under “Locations” of the file properties -> security -> add pane.