Sign into Accounts: Settings ❯ Mail/Contacts/Calendar/Notes/Reminders ❯ Accounts ❯ Add Account and tap on the relevant option (Microsoft Exchange, Google, yahoo, aol, outlook.com or Other) then enter sign in information. The first app that you add an account to will give you the option to add it to the others – e.g. Mail will show Mail ON, then Contacts, Calendars, Reminders and Notes ON – select as you wish
