Check out the following instructions, they'll go through how to use iCal with your business partners by publishing and subscribing:
Publish your calendar
To make your calendar available to others, choose Publish from the Calendar menu. In the resulting dialog, type a name for your calendar in the top field, choose to publish it on your own server from the "Publish on" pop-up menu, select any of the other options you want, and then click Publish.
When iCal finishes publishing, a dialog opens and displays the URL for your calendar—be sure to write this information down.
Subscribe to other calendars
You can use iCal to subscribe to someone's published calendar, such as a family member, your work team, or a publicly available iCal schedule.
If you have an iCloud account set up in iCal, you can choose to add the subscribed calendar to that account. You can then view the subscribed calendar in iCal as well as in the Calendar app on your iOS 5 or later devices that have been configured for iCloud. This works without having to resubscribe to the calendar.
- In iCal, choose Calendar > Subscribe.
- Enter the web address for the calendar you want to subscribe to, and then click Subscribe.
- Type a name for the calendar in the Name field and choose a calendar color from the adjacent pop-up menu.
- If you have an iCloud account, choose whether you want the calendar to be located only on your Mac or on your iCloud account. If you want to view a subscription calendar in iCal and in the Calendar app on devices with iOS 5 or later without resubscribing to the calendar, choose your iCloud account.
- If you want to receive any reminders or attachments, or hear any alarms associated with the calendar, deselect the appropriate Remove checkboxes.
- If you want iCal to update your copy of this calendar when changes to it are published on the Internet, choose the update frequency from the “Auto- refresh” pop-up menu.
- Click OK.
The calendar you subscribed to appears in your Calendars pop-up list under the heading "Subscriptions." To make changes to the calendar, click Calendars, select the calendar, and then choose Edit > Get Info.Notes
- Subscriptions that you manually add on iOS devices will not push to iCloud; you need to subscribe to calendars using iCal on OS X to push those subscriptions to your other devices and computers.
- icloud.com and Microsoft Outlook will not display subscribed calendars pushed to iCloud.
Find more information about using iCloud with calendar subscriptions.
All the best,