Despite the level of reliability provided by Microsoft, data loss in Office 365 may happen due to human error, viruses on the user’s side or other failures. Microsoft provides some mechanisms in Office 365 to prevent data loss. If you have Office 365 you have to think about security of your data. Microsoft is responsible for protecting the Office 365 physical and virtual infrastructure and ensuring availability. Although Microsoft addresses certain security threats, it cannot prevent all malicious threats. Businesses are responsible for protecting their data. So better to think about backup for microsoft office 365 to be sure that your data is safe and accessible whenever you need it.