- Go to Settings on your iPhone or iPad.
- Tap Mail, Contacts, Calendars.
- Tap Add Account... under the Mail section.
- Tap Other.
- Tap Add CalDAV Account under the Other section.
- Enter the info for your account:
Server Address: caldav.one.com
User Name: Enter the email address that you use when you log on your Webmail.
Password: Enter the password for the same email address.
Description: Give it a name so it's easy to recognize.
- Tap Next in the upper right corner and your iPhone or iPad will verify the account.
- If everything looks right, just tap Done and that's it.
Your CalDAV account will now start syncing with your iPhone or iPad.