https://www.vice.com/en_us/article/xweqbq/microsoft-contractors-listen-to-skype-calls

Contractors working for Microsoft are listening to personal conversations of Skype users conducted through the app's translation service, according to a cache of internal documents, screenshots, and audio recordings obtained by Motherboard. Although Skype's website says that the company may analyze audio of phone calls that a user wants to translate in order to improve the chat platform's services, it does not say some of this analysis will be done by humans.

The Skype audio obtained by Motherboard includes conversations from people talking intimately to loved ones; some chatting about personal issues such as their weight loss, and others seemingly discussing relationship problems. Other files obtained by Motherboard show that Microsoft contractors are also listening to voice commands that users speak to Cortana, the company's voice assistant.