Office 365 is vulnerable to both ransomware attacks and data loss due to human error or malintent. None of Office 365 services is safe from these events. Furthermore, Microsoft has limitations to the file recovery time. There’s a great chance you’ll detect the data loss after the recovery opportunity expires.
- Why backup Outlook/ Microsoft Exchange?
Your inbox contains irrecoverable data that might be essential for business daily operations.
Files in OneDrive can be changed on a regular basis. You need to have the access to the latest correct versions in case of their corruption.
People is basically the contact book for your business. Most contacts exist only there and will be hard to restore.
The calendar is essential for internal and external operations.