Connect to Exchange 2010
1. Go to Settings > Mail, Contacts, Calendars > Add Account
2. Tap "Microsoft Exchange"
3. Enter your full email address and password, plus a description of the account. Tap "Next"
4. Enter the server address, your username (the part of your email address before the '@' symbol), and your password. Tap Next
4a. The iPhone will attempt to verify your account information. If it succeeds, the following will be displayed:
If the verification attempt fails, enter the domain name as well (corp).
5. Set all options to "On", then tap "Save"