Chapter 1 Getting Started 13
5 If you’re setting up an Exchange or MobileMe account, tap the items you want to
sync—mail, contacts, calendars, and bookmarks (MobileMe only). For Exchange
accounts, you can also set how many days of email you want to sync to iPhone. Then
tap Save.
Important: If you sync contacts or calendars using your Exchange or MobileMe
account, syncing for contacts or calendars in iTunes is turned off. Any contact or
calendar information on iPhone is replaced by the contacts and calendars from your
Exchange or MobileMe account.

Push Accounts

MobileMe, Microsoft Exchange, and Yahoo! Mail are known as “push” accounts. When
new information is available, such as the arrival of an email message, the information
is automatically delivered (pushed) to iPhone. (In contrast, “fetch” services require your
email software to periodically check with your service provider to see if new messages
have arrived, and then request them to be delivered.) MobileMe and Exchange also
use push to sync your contacts, calendars, and bookmarks (MobileMe only) if you have
those items selected in the account settings.
Synced information is transferred automatically over your wireless connection; you
don’t need to connect iPhone to your computer to sync. If you don’t have a cellular
connection, iPhone can receive pushed data over a Wi-Fi connection when iPhone is
awake (the screen is on, or iPhone is connected to your computer or a power adapter).
Installing Configuration Profiles
If you’re in an enterprise environment, you may be able to set up accounts and
other items on iPhone by installing a configuration profile. Configuration profiles
provide a way for system administrators to quickly set up your iPhone to work with
the information systems at your company, school, or organization. For example, a
configuration profile might set up your iPhone to access the Microsoft Exchange
servers at work, enabling iPhone to access your Exchange email, calendars, and
contacts.
Configuration profiles can configure multiple settings on iPhone all at once. For
example, a configuration profile can set up your Microsoft Exchange account, VPN
account, and certificates for secure access to your company’s network and information.
A configuration profile may turn on the Passcode Lock, requiring you to create and
enter a passcode for using iPhone.
Your system administrator may distribute configuration profiles by email or by putting
them on a secure webpage.