It supports multiple platforms such as Android, iOS, and Google Chrome or other Chromium-based web browsers.
It is a part of Microsoft Authenticator app in Android and iOS,[3] and a browser extension on Google Chrome.
[1] The Microsoft Authenticator app requires biometric or device passcode as extra security.
The passwords on the device are encrypted, and encryption/decryption keys are not stored and are always generated when needed.
Passwords are synced over an SSL-protected HTTPS connection.