This document contains instructions on using a non-Microsoft email client, such as Apple Mail or Thunderbird. Microsoft does not recommend these clients for use with Office 365, and there are often significant limitations in client functionality as a result. Because of this, the DoIT Help Desk is only able to offer best effort support for these clients, and certain issues may require the use of a Microsoft client in order to be resolved. For more information on Office 365 client support, please see: Office 365 - Which clients/protocols will be supported?.
Best Effort Support Only
This document explains how to create a new calendar in Apple iCal (Mac OS 10.5-7) or Calendar (Mac OS 10.8-9).
You can check the availability of people who use Office 365 in order to find the best meeting time for everyone. Please refer to this KB doc for inviting Office 365 attendees. This will only work for events that are part of your configured Office 365 calendar, that is, in order for 'check availability' to work in iCal/Calendar, the event calendar needs to be set to the Office 365 calendar. Local calendars will not check availability with Office 365 servers.
In iCal/Calendar, double-click the event to which you want to invite people and the Info window will open (or from the menu bar select Edit -> Edit Event or Get Info).