While Microsoft guarantees data availability, it is the customer’s responsibility to protect their data. And there are many ways in which data could be lost, including the following scenarios:
A staff accidentally deletes data from an application such as Microsoft Teams, Project, or SharePoint
You decide to move out of Office 365 – only to discover that there is no way to migrate data from the Office 365 suite
A ransomware attack encrypts all your data, rendering them lost forever as all redundant copies are also encrypted
You discover that a former employee had accidentally made unwanted changes to Office 365 documents and there are no pre-change copies that you can go back to