- a Gmail or Google Apps account with an active Calendar
- Google Calendar Sync installed on each computer that you need to have a synchronised calendar
Basically you:
- Install the software
- You will be prompted to enter you calendar account
- You will notice a new icon in your sytem tray
It shows arrows when it is actively syncing - Right click to change options or to force an immediate sync
Detailed instructions and download details can be found here.