The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to add all your different accounts to the Microsoft Authenticator app.

Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.

Learn how you can use the free Microsoft Authenticator app to sign in to all your accounts without using a password.

You can get expert help with Outlook for iOS or Android from right inside the app! Easily communicate with our support team using the in-app support functionality in Outlook.

If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.

Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

The extra features below are available on iOS tablets and phones with a qualifying Microsoft 365 subscription. For information about the extra security and control features that are available for customers with a Microsoft 365 for business plan, visit the mobile apps for business page.

These viewers can open protected text files, protected image files, protected PDF files, and all files that have a .pfile file name extension on Windows, Android, or iOS.

借助 iOS 邮件应用将 Outlook.com、Microsoft 365 或基于 Exchange 的电子邮件帐户添加到 iPhone、iPad 或 iPod Touch。