HTTP/3 Adoption is Driving Huge Gains for Microsoft

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HTTP/3 Adoption is Driving Huge Gains for Microsoft

One of the ‘enabling’ technologies that we track on Internet Society Pulse is the latest version of the protocol that underpins the web, namely HTTP/3. In addition to powering the web, HTTP is increasingly used to transfer data between Internet-connected devices of all kinds.

In a recent Technical community update, Nick Banks highlighted the huge gains that deployment of HTTP/3 is driving for Microsoft Exchange Online. Microsoft have started deploying their recently released Windows Server 2022 and have enabled HTTP/3 on 20% of the front-end server capacity for They are now serving around 50,000 requests per second over HTTP/3.

HTTP/3 is built on the new transport protocol QUIC that was designed explicitly to improve performance and security for the applications that adopt it. The performance benefits of HTTP/3 are clear in the data shared in Nick’s article — they are seeing over 60% reduction in request latency for the worst performing flows. Even previously well-behaved flows are seeing reductions in latency of nearly 10% and given how important responsiveness is for cloud-based applications in general, these gains are important.

As Nick notes, “HTTP/3 [is] proving huge gains in responsiveness for Microsoft 365!”

Photo by Marc-Olivier Jodoin on Unsplash