Our primary use case is for Office 365 Backup. We started out as an Exchange Online only company. Then we were looking for some sort of backup solution to augment the existing Microsoft Office 365 archiving features for a price that was more compatible with our company versus what Microsoft was offering for their archiving solution. We also needed the ability to do time and date stamp retrievals. We ended up settling on Commvault at that time. We've been with them, and we've seen it more from being in the Commvault virtualized infrastructure to being the Metallic.io SaaS solution.
We protect mostly Exchange Online, but really we do the whole breadth of Office 365 with them. We were looking at some other solutions, but with them, we're doing our entire Office 365 Microsoft Online platform.