To configure your Exchange account on an Iphone:
1. Tap Settings > Mail > Add Account > Exchange.
2. Enter your email address and password. Account Description is personal preference (i.e work) but is not required.
3. The Device will now detect your account settings and display them for you. Confirm the following:
Domain\Username: *Your full email address*
Security Type: SSL/TLS
4. Once the account settings have been set, it will ask you what you wish to sync (e.g Mail, Contacts, Calendars).