Getting Started with Microsoft Graph and Throttling

Throttling limits the number of concurrent calls to a service to prevent overuse of resources. Microsoft Graph is designed to handle a high volume of requests. If an overwhelming number of requests occurs, throttling helps maintain optimal performance and reliability of the Microsoft Graph service. Learn more about throttling guidance in this video.

To learn more about Microsoft Graph and Throttling,

[thesofakillers]

The Retry-After header is a myth (at least when interfacing with Microsoft Planner - which btw has no clear explicit documentation regarding API request limits)