If your organization has scheduled an interview using the Outlook 365 integration, you can cancel / delete the interview directly from Greenhouse Recruiting.
To cancel an interview scheduled with the Outlook 365 integration, navigate to a candidate profile with an interview that needs to be cancelled (Jobs > Job > Candidates).
From the candidate profile, scroll to the Stage tab on the On Job panel and expand the stage that requires a cancelled interview.
Click Update next to the scheduled interview.
From the Scheduling for candidate page, click Delete Interview in the bottom-left corner.
The interview is deleted, and the scorecard is removed from the interviewer's My Dashboard page in Greenhouse Recruiting. The interviewers will be notified by email only if your organization has configured calendars to send email notifications for cancelled events.