![Choosing the Microsoft Authenticator app for multi-factor authentication to Office 365 : Support Hub Choosing the Microsoft Authenticator app for multi-factor authentication to Office 365 : Support Hub](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/4131627798/original/V6BHmGt60wp-e3AyWtmW-mhw9U-CFBSm6w.png?1680701326)
Choosing the Microsoft Authenticator app for multi-factor authentication to Office 365 : Support Hub
![Microsoft tests use of iPhone authenticator app as password replacement in Windows 10 S mode preview | AppleInsider Microsoft tests use of iPhone authenticator app as password replacement in Windows 10 S mode preview | AppleInsider](https://photos5.appleinsider.com/gallery/24756-32714-win10sauth1-xl.jpg)
Microsoft tests use of iPhone authenticator app as password replacement in Windows 10 S mode preview | AppleInsider
![You can download Microsoft's new Windows 10 Mobile Authenticator app, but it's still in beta - Neowin You can download Microsoft's new Windows 10 Mobile Authenticator app, but it's still in beta - Neowin](https://cdn.neowin.com/news/images/uploaded/2016/03/microsoft-authenticator-phone-pc_story.jpg)
You can download Microsoft's new Windows 10 Mobile Authenticator app, but it's still in beta - Neowin
![Using passwordless sign-in with Microsoft Authenticator app | Information Technology Services Center Using passwordless sign-in with Microsoft Authenticator app | Information Technology Services Center](https://itsc.hkust.edu.hk/sites/default/files/site-images/Security-Info/authenticator_code_.png)