I turned off SMB v1 on my Windows Server and then noticed that the Kodi running on my Nvidia Shield TV stopped being able to read the the file share on the server. The SMB connection had been made within Kodi itself running the latest version.
What is the situation on support for SMB version 2 by Kodi as the next version of Windows 10 will probably not have SMB v1 in it so it simply would not be able to connect to a Windows 10 share. See here for news on this.