Tap Settings > Mail, Contacts, Calendars > Add Account.
In the Add Account page, tap Exchange.
Enter your full email address, password, and a description of the account (it can be anything you choose) and then tap Next.
By default, Mail, Contacts, and Calendar information are synchronized. Tap Save.
If it does not work and expands asking for server information, then either your email or password are incorrect. Please email firstname.lastname@example.org for more assistance.