Microsoft has removed Wi-Fi Sense network sharing feature from Windows 10 that shares your WiFi password with your Facebook, Skype and Outlook friends and enabled by default. Microsoft will remove the feature as part of its Anniversary Update due in the summer. The company will keep the feature that lets its users connect to open networks that it knows about through crowdsourcing. The biggest threat comes in when you choose to share your network with any of your contact lists, but it does give your contacts access to your network. Anyone in your contact list with a malicious mind can perform Man-in-the-Middle attacks.
Source: https://thehackernews.com/2016/05/windows10-wifi-sense.html