As Microsoft explains, "over the last couple years, Microsoft 365 has evolved into our flagship productivity suite, so we are creating an experience to help you get the most out of Microsoft 365. In the coming months, Office.com, the Office mobile app, and the Office app for Windows will become the Microsoft 365 app, with a new icon, a new look, and even more features."
Microsoft has noted visual and feature changes. WPI Hub content will transition to "Microsoft 365" references in place of "Office 365."
No action is needed to continue using the apps available through your WPI login. Additional details are in the Microsoft 365 FAQs (Actions). These are also available when you open a Microsoft web app (Actions).
Microsoft displays this notice containing a link to "learn more" when a Microsoft web app is opened: