One of Microsoft's employees fell victim to a data leak. A few days ago, the hacker group Lapsu$ released 37GB of source code stolen from several Microsoft projects, including Bing, Cortana, Bing Maps. Everthing was stolen from the Azure DevOps server (referred to as "a Microsoft product that provides version control, reporting, requirements management, project management, automatic builds, testing, and version management." This now gives you an insight into how specific products were created by Microsoft.