Apple iPad For iOS 4.3 - Manual (Page 173)

LDAP and CardDAV Accounts
When you set up an LDAP account, you can view and search for contacts on your
company or organization’s LDAP server. The server appears as a new group in Contacts.
Because LDAP contacts aren’t downloaded to iPad, you must have an Internet
connection to view them. Check with your administrator for account settings and
other requirements (such as VPN).
When you set up a CardDAV account, your account contacts are synced with iPad over
the air. You may also be able to search for contacts on your company or organization’s
CardDAV server.
Set up an LDAP or CardDAV account:
1 In Settings, tap “Mail Contacts, Calendars,” then tap Add Account.
2 Tap Other, then tap Add LDAP Account or Add CardDAV Account.
3 Enter your LDAP account information, then tap Next to verify the account.
4 Tap Save.
173 Appendix A iPad in the Enterprise