Earlier quoted context omitted.
They need all that information for things like Cortana to do it's magic. For those of us that don't need or want Cortana (or Siri or OK Google) on the desktop, they shouldn't need my data. Telemetry after a crash or with regards to OS function usage seems OK to me, but I don't want my calendar, phone book, or email sent to the cloud for analysis. I don't see how small medical offices can use Windows anymore (big ones…
I recommend that you read this: https://technet.microsoft.com/en-us/library/mt577208(v=vs.85...
I only have access to Windows 10 Pro and would like to turn off all personalization options. All I want my operating system to do is support the applications I want to run.
I've found some of the Powershell scripts that do things like uninstall the XBox music app (or whatever it's called), but after an update it just reappears. It's very frustrating.