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M365 Changelog: Microsoft Graph to Support HTTP/2 as of September 2023

Rabia Noureen


MC447341 – Beginning September 15, 2023, the Microsoft Graph service ( will enable HTTP version 2 (HTTP/2) in addition to HTTP/1.1. for API requests. 

When this will happen:

September 15, 2023

How this affects your organization:

Once implemented, client applications that indicate support for HTTP/2 in their connection request will be able to negotiate HTTP/2 if requested.

While HTTP/2 is backwards-compatible by design, some applications may be impacted by this change. For more information, please visit Microsoft Entra change announcements – September 2022 train.

What you can do to prepare:

To learn more about working with Microsoft Graph, visit Microsoft Graph documentation | Microsoft Docs. To learn more about the Microsoft Graph SDKs, visit Microsoft Graph SDK overview – Microsoft Graph | Microsoft Docs

For technical assistance, please contact Microsoft Graph Dev Center | Support

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