RescueTime will create a new calendar that will contain daily summaries about your time. Each day, an new summary is created showing details of your logged time in RescueTime and the time blocked off on your calendar.
When you connect RescueTime to Office 365, you will be asked to grant the following permissions
This permission is necessary to create the dedicated RescueTime calendar that summaries will be posted to. RescueTime will not add, edit or delete anything from your existing calendars.