To open the Calendar 365, following steps must be followed:
Go to AppJetty -> Calendar 365
Here, you get two calendars: Resource Calendar & Customer Calendar.
Resource Calendar: It is for User and Facility/Equipment.
Customer Calendar: It is for Contacts and Accounts.
If you want to manage activities for the Users/Teams, Bookable Resource or Facilities/Equipment, select Resource Calendar while to manage activities for Contacts/Accounts (clients), select Customer Calendar.
Calendar page would load, and all the activities will be displayed in the calendar as per the default configuration made from the settings.