Had a good hunt around for an answer to this google apps query but can't find a direct answer so going to flick this one out to the community.
The plan: We have a Google Apps domain account and we want to make use of the calendar API and create a PHP web app that pushes events to the calendars of all users of a google apps domain when triggered.
Question: Is it possible to push to all users? Or from what I read is this impossible to achieve this without the users actually being logged in etc and authorizing itself?