Final answer:
The Microsoft 365 Roadmap and Microsoft Azure Portal are the best sources for information about upcoming changes and features in Microsoft products, including Office 365 and Azure.
Step-by-step explanation:
The best source for information about upcoming changes and features in Microsoft products is the Microsoft 365 Roadmap. This roadmap provides a comprehensive view of what new features and updates are planned for Microsoft 365, including Office 365 and related services.
Another useful resource is the Microsoft Azure Portal, which provides information specifically about changes and updates related to Microsoft Azure.
Both the Office 365 Service Status and Reddit Technology News can also provide information about changes and features, but they may not be as comprehensive or up-to-date as the Microsoft 365 Roadmap and Azure Portal.