One method users can use to synchronize contacts, calendars and notes on the iPhone or iPad is the CalDAV and CardDAV protocols. NOTE: For ease of configuration on iPhone/iPad, the system administrator should set up a CalDAV and CardDAV SRV DNS record. This is what makes the iPhone/iPad auto-discover settings.

Configuring Address Book using CardDAV
Follow these steps to set up CardDav on the iPhone or iPad:

1. Open the settings application.
2. Tap Mail, Contacts, Calendars.
3. Tap Add Account.
4. Tap Other as account type.
5. Tap Add CardDAV account.
6. For server, type yourdomain.com
7. Enter your full email address for User Name, and then type your password.
8. Tap Next.
9. If your mail server does not support SSL, a warning will be displayed. Tap Continue.
10. If the iPhone/iPad is unable to verify the account information perform the following:
    • Tap OK.
    • Tap Advanced Settings.
    • Make sure Use SSL is set to OFF.
    • Change port to 80.
    • Account URL should be: http://yourdomain.com:80/WebDAV/
    • Go back to account information and tap Save.
11. Your contacts will now be visible in the Contacts application

Configuring Calendar using CalDAV
Follow these steps to set up CalDav on the iPhone or iPad:

1. Open the settings application.
2. Tap Mail, Contacts, Calendars.
3. Tap Add Account.
4. Tap Other as account type.
5. Tap Add CalDAV account.
6. For server, type yourdomain.com
7. Enter your full email address for User Name, and then type your password.
8. Tap Next.
9. If your mail server does not support SSL, a warning will be displayed. Tap Continue.
10. If the iPhone/iPad is unable to verify the account information perform the following:
    • Tap OK.
    • Tap Advanced Settings.
    • Make sure Use SSL is set to OFF.
    • Change port to 80.
    • Account URL should be: http://yourdomain.com:80/WebDAV/
    • Go back to account information and tap Save.
11. Your calendar will now be visible in the Calendar application