how can I sync google apps calendars?

NULL

Hi,
You have to add other calendar(s) as account(s).
Tools -> Accounts -> New account -choose CalDAV/CardDAV.

The format of the URL is [https://www.google.com/calendar/dav/ Google Calendar ID]/events
where [your Google Calendar ID] is [long string of characters]@group.calendar.google.com. You can find the calendar ID by logging into Google calendar, clicking settings under My Calendars or Other Calendars, and clicking the title/link of the Calendar you wish to sync. The calendar ID will appear in the Calendar Address section, to the right of the XML/ICAL/HTML buttons. For the username, use your full email address. For many Gmail users, this is simply username@gmail.com.

I believe that if you are Google Apps user this is the correct URL to use:

The calendar ID is your address@domain.com, where generally this is your google apps email address that you use to log into Google Apps

For example if your email address is: emclientuser@emclient.com

Then you would use:
https://www.google.com/calendar/dav/e…

What is interesting is that after you sync the first time the URL will be changed to:
https://www.google.com/calendar/dav/e…

These are instructions as copied from Google Calendar Help:
http://www.google.com/support/calenda…

The Google Calendar URL is:

https://www.google.com/calendar/dav/Y…

Replace ‘YOUREMAIL@DOMAIN.COM’ with the email address that you use to log in to Calendar. Make sure to include the ‘@domain.com’ portion (which is @gmail.com for Gmail users) in this section.
DO NOT substitute your username for ‘user’ at the end of the URL.