On demand backups for CRM Online instance

With on demand backups, you can make your own backup before making some significant customization change or applying a version update.

About CRM managed on demand backups:

You can back up Production and Sandbox instances.
You can only restore to a Sandbox instance. To restore to a Production instance, first switch it to a Sandbox instance. See Switch an instance.
Only CRM Online 2016 Update 1 or later versions are supported for backup.
On demand backups are retained for up to three days. Check your expiration date.
On demand backups are identified as created by someone other than System and by the presence of Edit | Delete | Restore in the details section. System backups only have Restore.