https://arstechnica.com/gadgets/2019/08/microsoft-will-continue-human-voice-recording-review-and-its-privacy-policy-says-so/

A wave of privacy scandals has led several major companies to end or pause their programs for human reviews of voice recordings. But Microsoft has bucked the trend.

Last week, a whistleblower went to the press to reveal that Microsoft relied on employees and contractors to review recordings made by its Skype Translator call platform and its Cortana voice assistant. The company had documentation informing users that audio recorded by its services might be reviewed to improve systems for language processing, but there was no explicit mention that the reviews would be done by humans.