Did Microsoft buy Sentinel?

Have you heard any recent news about Microsoft potentially acquiring Sentinel? It's been a hot topic of conversation in the tech and cryptocurrency communities lately. If true, this acquisition could have significant implications for both companies, as well as the broader industry. Could you elaborate on what this potential deal might mean for Microsoft's future strategy, and how it could potentially impact the growth and development of Sentinel? Additionally, what are some of the potential challenges and risks associated with such a deal?