The information and screenshots in this guide were sourced from the Apple setup guide available for download from the Apple web site: http://www.apple.com/iphone/enterprise/integration.html

From the Home screen tap Settings

Tap Mail, Contacts, Calendars

Tap Add Account

Tap Microsoft Exchange

Enter your email address, domain, username and password. The description field can contain anything meaningful to you to identify the email account. "Work Email" might be an example.

Tap Next when all fields have been completed. The device will now attempt to ascertain the correct server settings to use automatically based on the email address entered. This feature requires Exchange 2007 and also requires that the 'autodiscover' feature is enabled and configured correctly. Should the device not be able to determine the server information automatically the following screen will be displayed:

Tap Accept.

Enter the server information and tap Next.

Select the folders which you want to synchronise. Tap Save to complete the setup procedure and begin the initial synchronisation with the server.

If your administrator has enforced a password policy on the server, you will be prompted to enter a password on the device:

Enter your desired password twice. You are now set up to synchronise with your Exchange server. Tap Next to configure further options: