I need to create a calendar that people can access via iCal so they can add it to their existing calendar application i.e. outlook or there Google calendar. So I could create a calendar in Google Calendar and share the URL.
I want to be able to limit who can have access the calendar. I also want to be able to revoke someone access at a later date.
The users are not all in a one company but spread out. IDeally I am looking for a free solution.