Users sometimes delete stuff without thinking. Sometimes Admins do too!
Microsoft only keep backups of Office 365 for 2 weeks, so if you delete something by mistake, you may find it is gone for good.
Raven-Eye Backup for Office 365 can backup your all SharePoint, OneDrive and Exchange Online data, allowing you to retrieve or roll back changes on files, emails, and pretty much anything else.
Call us for more details.