Microsoft 365 (Email and Calendaring System)
Office 365 is a cloud-based service provided by Microsoft. To see what features are available in UW-Madison's implementation, check here: Microsoft 365 - What features are included in Microsoft 365?
Microsoft 365 Account
The location in the Office 365 system where your email, calendar, task list, and address book are stored. Each Office 365 account has one primary address, but can have many alternate addresses.