Earlier quoted context omitted.
I saw this tool being recommended in r/windows10. I have tried it, no issues so far, though haven't tested to see if it does disable telemetry. https://www.oo-software.com/en/shutup10
The point of the report above is that you can NOT disable all telemetry, not even in the Enterprise version of Windows.
I don't for a second doubt you can turn it off completely. But unofficial solutions come with tons of potential issues.