Hi @drsilv2 , we use Office 365 as well. There may be multiple ways to do this, but if I want to add an appointment on someone's calendar, then I go into the calendar app of Office 365 and create a new calendar event. After filling in all of the appropriate details, I am able to add someone under the "people" area of a calendar event creation and indicate they are a required attendee. This individual will see a calendar invite and can accept the invitation.
Do these steps work for you? Since you didn't mention the Canvas calendar, I assumed here that you just wanted to work within Office 365.
All the best!
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