Android
To back up your one-time password accounts on an Android device:
- Open Microsoft Authenticator.
- Tap the three vertical dots in the upper right corner of the app.
- Select Settings from the contextual menu.
- Turn on the Cloud Backup toggle.
- Select a Microsoft personal account where the backup will be stored.
iOS
To back up your accounts on an iOS device you need to enable iCloud to use Authenticator and then enable backup in Authenticator.
- Enable iCloud Drive on your iOS device. Enable iCloud.
- Enable iCloud Keychain on you iOS device. Enable iCloud Keychain.
- Enable iCloud Backup on your iOS device. Enable iCloud Backup. Go to your Saved to iCloud list and search for Authenticator. How to choose which apps use iCloud.
- Turn on the toggle for Authenticator.