How to Add a Standard Account on your iPhone: Open "Settings"…
Click "Exchange"…
Click on "Mail, Contacts, Calendars"…
Type in the full email address and password and leave the default Description, then click “Next”… Click "Add Account"…
Wait for the new account to verify (blue checkmarks will appear before moving to the next screen)…
Turn on (move to the right/green) the items you want synced to your iPhone…
Click “Save”…
If you slide the “Contact” button to the right (green) you will receive the popup below. Click “Keep on My iPhone” to keep your internal iPhone contacts as well as your synced Exchange contacts (NOTE: If you click “Delete” it will delete all of the local contacts that are stored on your phone)…
You can now exit “Settings”…
How to Delete an account from your iPhone:
Click on “Delete Account”…
Open "Settings"…
Click on "Mail, Contacts, Calendars"…
Click on “Delete from My iPhone”…
Click on the account you want to delete…
Wait for account to be deleted…
Exit “Settings”…