Windows 10 ver 1607: File Explorer long paths not working?

I've asked Microsoft employee Gov Maharaj and the feature is not ready to be enabled for Windows Explorer. So you still have the issue with Explorer. You have to wait until Microsoft enables it for Explorer or use a 3rd party file management tool which is compatible with the long paths and has the setting

<application xmlns="urn:schemas-microsoft-com:asm.v3">
  <windowsSettings>
    <longPathAware xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</longPathAware>
  </windowsSettings>
</application>

set in its manifest file.

Fixed It
You could use One Commander, a Windows Explorer like app, to copy files with long absolute paths.
I tried it on my Win 10 when an upgrade to version 1607 too did not fix the long file name issue.

I was able to successfully copy the files.