If you use syndicated calendar pages, then you can create a calendar feed that your users can subscribe to. Once they subscribe and add the feed to their calendar client (such as Gmail, Outlook, and Yahoo! Mail), then their own calendars will automatically be updated with whatever changes you make to the syndicated calendar.
Navigate to the syndicated calendar page that you want to generate an iCal feed for.
Click either the Quick Edit or the Full Edit button.
In the Calendar Properties section, select Generate iCal feed for Calendar.
Click Save and submit for publication.
To obtain the link for the iCal feed, navigate back to the syndicated calendar page and examine its address in your browser. It will look something like this:
http://servername.activenetwork.com/Page44.aspx
Note: Your server name and page number are most likely different from those in the example on this page.
Add the following text to the end of this address: ?mode=ical
The address should now look like this:
http://servername.activenetwork.com/Page44.aspx?mode=ical
This is the address that your users require to subscribe to your syndicated calendar.
Notes: To create an iCal link for users with Outlook clients, add the following text to the end of your address: ?mode=ical&target=outlook
The address will look like this:
http://servername.activenetwork.com/Page44.aspx?mode=ical&target=outlook
To obtain the link for a specific category, include additional text that identifies the category:
http://servername.activenetwork.com/Page44.aspx?mode=ical&category=481
You can place this link in a location of your choice on any of your pages. When users click on this link, they are prompted to download an *.ics file. They can then import this *.ics file into their calendar client according to that calendar client's unique instructions.