According to Microsoft, "This process is easier than standard two-step verification and significantly more secure than only a password, which can be forgotten, phished, or compromised".
Microsoft appears to be targeting both home users and those in business. Instead of entering your password, you'll get a notification on your phone.
The feature, which relies on users having access to their mobile phones, is based around Microsoft Authenticator, a two-factor authentication app the company announced last July and released last August.
Windows 10 users already have a bevvie of options for signing in, including fingerprint, biometric, face recognition, PIN code, and FIDO key, courtesy of Windows Hello, the company's ongoing quest to find an alternative to passwords.
Microsoft's Alex Simons writes in the post: "Here in the identity division at Microsoft, we don't like passwords any more than you do!" With this feature, users will no longer be required to type in their passwords to log into their accounts and can simply get the access by approving the prompt on their phones. Once they have added the account, whenever they sign in somewhere new, they will receive a notification on their phone.
The new feature is clearly a response to the newly streamlined Google Authenticator app which makes signing in easier thanks to a tap-to-verify system.
In the meantime, Microsoft is encouraging Wunderlist users to make the switch by offering an importer that will bring in your lists and to-dos from Wunderlist into To-Do, where those items will now be available in other Microsoft products, like Exchange and Outlook.
If for some reason you don't have your phone handy, you can choose to enter your password instead. The To-do list app had more than 13 million customers at the time of acquisition, and Microsoft raved about the acquisition in their blog post, and about how the Wunderlist app fits nicely into their business productivity product portfolio.
"If/when it becomes a big success on those high-scale platforms, we will evaluate adding support for Windows Phone", he said.