To sync Calendars with an Exchange account, tap Exchange when launching Calendars for the first time, then follow the onscreen instructions. And here's how you can add an Exchange account later on:
- Open the Calendars app.
- Click Calendars in the Menu Bar at the top.
- Select Settings > + Add account button.
- Click Exchange and follow the onscreen instructions.
Note: You can use the ⌘, shortcut to access the Calendars settings.
- Open iOS Settings > Calendar > Accounts.
- Tap Add Account and follow the on-screen instructions.
- Open Calendars > Menu icon > Settings > Local Calendars.
- Enable the Display Local Calendars toggle.
- Enable your account’s toggle.