If you want to try this feature before it's available to the general public, If you don't have the Microsoft Authenticator app yet, But later this year, we'll add this feature to the Android version as well.
We're rolling out to iOS first as building the app using iCloud simplified our development. Over the next few weeks, we'll roll this out to all iOS users. We're launching this feature beginning with iOS first, and we've already released a private preview to our iOS beta testers. Now, your Microsoft Authenticator app will keep your account credentials, so you won't get locked out of your accounts when you move to a new device. We've heard that need, and that's why I'm happy to announce that we've just released a backup and recovery feature for that app. Many of you have asked for backup and recovery for the Microsoft Authenticator app. First published on CloudBlogs on Apr, 24 2018