Go to https://www.office.com/ and login with your SU email address and password
Select the Outlook App from the list of available applications at the top
Beneath the mailbox/folders pane on the left hand side choose the calendar icon
From the calendar view you can select which calendars your would like to view in the available list in the panel on the left.
If multiple calendar items are planned for the same date you will see 3 small dots on the bottom of the calendar date.
Select the 3 dots to view all items scheduled for that date in the right side pane.