How to set up a mail, calendar, and contacts Exchange account on your iPhone, iPad, or iPod touch

1. Open the Settings app.


2. Tap Passwords & Accounts or Mail, Contacts, Calendars on older OS versions.


3. Tap Add Account.


4. Tap Microsoft Exchange.
   


5. Enter your email address and press Next. Press configure manually.


6. Enter your password and press Next.


7. Enter your Exchange account settings (provided by TkFast).
   


8. Select what you want to sync (Mail, Calendar, Contacts, Reminders).
   


9. Tap Save.





You can go back to Settings and configure how many days of mail you want to sync, along with advanced settings like SSL and S/MIME as well.