Apple iPod touch iOS 3.1 - Manual (Page 15)

Similarly, when you disable contacts or calendars in an MobileMe or Exchange
account, or if you delete an account, iPod touch asks if you want to keep information
or delete it.
You can add contacts using an LDAP account if your company or organization
supports it. See “Adding Contacts” on page 84.
You can subscribe to CalDAV or iCal (.ics) calendars. See “Subscribing to and Sharing
Calendars” on page 75.
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 iPod touch. (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 iPod touch to your computer to sync. iPod touch can receive
pushed data over a Wi-Fi connection only when iPod touch is awake (the screen is on,
or iPod touch 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 iPod touch by installing a configuration profile. Configuration profiles
provide a way for system administrators to quickly set up your iPod touch to work
with the information systems at your company, school, or organization. For example,
a configuration profile might set up your iPod touch to access the Microsoft Exchange
servers at work, enabling iPod touch to access your Exchange email, calendars,
and contacts.
Configuration profiles can configure multiple settings on iPod touch 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 iPod touch.
Your system administrator may distribute configuration profiles by email or by putting
them on a secure webpage. A system administrator may also install a configuration
profile directly on iPod touch for you.
15 Chapter 1 Getting Started