With the Windows 10 Fall Creators Update, the SMB1 protocol will be disabled by default. It is an old protocol is considered unsafe. The Microsoft blog post below contains a list of products that requires SMB1.
SMB1 Product Clearing House
https://tinyurl.com/ybbarufn
Here's the official KB for the Windows 10 and WS 2016 RS3 SMB1 removal plans.
https://support.microsoft.com/en-us/...windows-server
