About iCloud Backups

It is possible to back up iOS devices data not only locally, but also to iCloud. For more information, please read:

iCloud - Store and back up your content in iCloud

Creating an iCloud account: Frequently Asked Questions

iCloud: Backup and restore overview

Once you have enabled Backup on your device (Settings | iCloud | Backup & Storage), it will run on a daily basis as long as the device is connected to Internet over Wi-Fi, connected to a power source, and has the screen locked.

If you know the Apple ID and password (or authentication token of iCloud user), EPB can extract backup from the iCloud, decrypt it, and convert to the same format as used by iTunes. After decryption is completed successfully, you can explore the backup content using Elcomsoft Phone Viewer.