Microsoft Graph - a useful tool

Microsoft Graph contains digital artifacts on life and work, and also ensures privacy and transparency. An overview of Microsoft Graph explains how it is a gateway to data and intelligence in Microsoft 365. 
The Microsoft Graph exposes APIs for:

• Azure Active Directory
• Office 365 services: SharePoint, OneDrive, Outlook/Exchange, Microsoft Teams, OneNote, Planner, and Excel
• Enterprise Mobility and Security services: Identity Manager, Intune, Advanced Threat Analytics, and Advanced Threat Protection.
• Windows 10 services: activities and devices
• Education

The quick start page explain usage and provides examples.