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?
Primary Address
In Microsoft 365, your primary address is the email address associated with your Microsoft 365 account that will appear as your "From" address on emails and calendar invites. It will also appear as a result in the global address look up feature in Microsoft 365. For further information, click here.