The biggest mistake users make with Office 365 backup is assuming that the various backup platforms provide the same level of protection as on-premise backups. It is safe to say that most administrators probably research backup products or services prior to making a purchase. But unless restorations are performed on a regular basis, admins can forget exactly what the backup offering is capable of doing.
First, most modern on-premise backup products provide near continuous data protection at the block level. If a data loss event were to occur, such a solution should be able to restore all but the last few minutes’ worth of data. In contrast, the backup offerings for Office 365 (at least the ones that I have seen) are more like legacy backup products. Rather than performing continuous backups, such products perform daily scheduled backups. This means that a data loss event could result in several hours’ worth of data being lost.
The other major shortcoming in Office 365 backup platforms is that they offer different degrees of protection for the various Office 365 products. To the best of my knowledge, there is no product that provides comprehensive protection for all Office 365 data. The backup features that I have seen tend to have decent protection for Office 365 Exchange, less impressive protection for SharePoint Online, and little to no protection for Link and Yammer. Protecting Office 365 Exchange is easy, but protecting other Office 365 data can be more challenging.
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