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Microsoft Authenticator is a Microsoft Corporation app for iPhone that helps people sign in more securely with multi-factor authentication, passwordless sign-in, and password autofill. Microsoft says it can also manage Microsoft personal, work, or school accounts, which makes it useful for anyone who uses Microsoft services at home or through an organization. The app is listed as free in the App Store. The current verified iPhone metadata shows a minimum iOS requirement of 17.0, so users should check App Store compatibility before installing. (apps.apple.com)
For multi-factor authentication, the app adds a second step after a password is entered. Microsoft says you can approve a push notification in the app or enter a one-time password generated by the app. The company notes that these codes use a 30-second timer and do not require a network connection. Microsoft also says you can add multiple accounts, including non-Microsoft accounts such as Facebook, Amazon, Dropbox, Google, LinkedIn, and GitHub. (apps.apple.com; microsoft.com)
The app also supports passwordless sign-in for Microsoft accounts. According to Microsoft, you enter your username and then approve a notification sent to your phone, with fingerprint, Face ID, or PIN used as a second layer of security. Microsoft says this can provide access to Microsoft products and services such as Outlook, OneDrive, and Office after you complete the sign-in flow. (apps.apple.com; microsoft.com)
Microsoft also positions the app for work and school use. It says some organizations may ask employees or students to install Microsoft Authenticator to access certain resources, register the device with the organization, and add the work or school account. Microsoft says the app supports certificate-based authentication by issuing a certificate on the device, which helps an organization recognize the sign-in request as coming from a trusted device. (apps.apple.com; microsoft.com)
The App Store listing says Face ID permission is optional and helps enable app lock, while Camera permission is optional for scanning QR codes when adding accounts. Microsoft also states that users can continue using the app without granting those permissions, though some features may be limited or unavailable. In practical terms, that means the app can work as a straightforward authenticator, but setup features such as QR-based enrollment and stronger local app protection may depend on permissions you choose to allow. (apps.apple.com)
Get the app
Microsoft Authenticator website · Microsoft Authenticator for iPhone
Product information checked October 25, 2026. Availability and requirements can change. The social preview is rendered from the app icon or captures the official app or website.
Video overview
Get started with Microsoft Authenticator on YouTube · Microsoft India Development Center (IDC)