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The true power of PowerApps (and Power Platform speaking) lays not in the platform itself but in the integration with other platforms. Thanks to that your app can use the capabilities of another service. I like to think about integration as “borrowing the power of other services” in a way. PowerApps contains over 350+ connectors to different services (not only Microsoft’s!).
You can find a list of all connectors here.
From that list few connectors deserve special attention because of their flexibility and how they greatly improve Power Platform extendibility:
- Office 365 Users
- Power BI