Microsoft has been making its GitHub subsidiary more dependent on the company's own Azure public cloud.
Otherwise, some developers wary of Microsoft's past behavior might not want to use GitHub to store their software code.
The company would also speed up the ability for developers at large companies to use Microsoft's cloud infrastructure, Nadella wrote.
Instead of pushing developers to run their code on Azure, GitHub has simply introduced new products and features, many of which are built on Azure.
In September Microsoft informed investors that its closely watched Azure and Other Cloud Services revenue growth number each quarter would expand to include "additional GitHub cloud revenue now delivered via our datacenter infrastructure."