error when hitting the limit for Microsoft Graph API in Dynatrace cloud platform

Question

While using the Dynatrace platform, we encountered an issue with the Send Email feature, which relies on the Microsoft Graph API.
There is an error occurred (Microsoft Graph API responded with a status code 429 Too many requests)
I want to know the specific rate limits applied to our tenant for Microsoft Graph API and to have guidance on how to prevent this issue from recurring again and permanently fix it.

Answer 1

Microsoft Graph applies two layers of throttling at the same time:

1. Global Graph limits (across all services)
2. Service‑specific limits (Mail / Outlook workload)

Any request can be evaluated against per‑app, per‑tenant, or per‑app‑per‑tenant limits — the first one exceeded triggers throttling.

When throttling happens, Graph:

• Returns HTTP 429
• Blocks further requests for a period
• Includes a Retry‑After header telling you how long to wait before retrying

Reference: https://learn.microsoft.com/en-us/graph/throttling-limits