For usage reporting across the Office 365 platform, currently this is possible via the Office 365 Adoption Content Pack in PowerBI.  This content pack is a pre-release version.

NEWS from Ignite 2017

• Will go GA in Q1 2018 as the “Office 365 Usage Analytics” in Admin Center
• A non-admin “Report Reader” role has been added
• New insights and capabilities are still being added, see Roadmap
• New Microsoft Graph Reporting APIs to go GA in production (ETA week of Oct 2nd, currently in Beta)
  • https://graph.microsoft.com/v1.0/reports/Office365ActiveUserDetail(period=’D7′)?format=test/csv
  • Deprecating older reporting web services/command-lets
  • New beta end point returns JSON with full ODATA support
    • https://graph.microsoft.com/beta/reports/Office365ActiveUserDetail(period=’D7′)?format=application/json
  • Integrates into Graph SDK
• Session information can be found @ https://aka.ms/Office365UsageReporting
• Sessions:
  • Understand how your users are using Office 365: Introducing Advanced usage reporting tools
  • Understand how your users are using Office 365: What’s new in usage reporting