Getting started with Fantastical is simple. First, you need to add your calendar accounts in Preferences.
Start by clicking on the Fantastical icon in your menu bar to reveal the Mini Window, then click the gear icon in the lower right to open the actions menu. Choose Preferences from the menu. You can also access the preferences by selecting Preferences from the Fantastical menu.
To add a new account, go to the Accounts pane in Preferences.
Apple requires that iCloud accounts have two-factor authentication enabled in order for apps to connect to iCloud's calendar or mail servers. If you don't have two-factor authentication enabled, enable two-factor authentication on your iCloud account before continuing.
To add a Google account:
To add an Exchange account:
Once you've added your Exchange account you can enable delegated or shared calendars by clicking "Manage Delegates..." in the Accounts preferences. See Delegated and shared calendars on Exchange for more information.
If your organization uses Office 365 then add your account as an Office 365 account. If you are having trouble adding your Exchange account and you're not sure if your organization uses Office 365, you can also try logging in to Office 365 with your Exchange email address and password.
If your organization uses Office 365 then it is better to add your account as an Office 365 account rather than an Exchange account. This will allow Fantastical to connect using any single-sign-on or multi-factor authentication methods used by your organization.
To add an Office 365 account: