Microsoft's 50th anniversary featured co-founder Bill Gates, former CEO Steve Ballmer, and current CEO Satya Nadella, with an interview conducted by the AI assistant Copilot. The event included humorous exchanges where Copilot roasted the CEOs, prompting lighthearted responses from them. Microsoft also launched new website pages to document its history and vision for the future, reflecting on its growth and innovations since its founding in 1975.