Look at the Group Members. The people you added from the Global
Address Book will have free/busy calendars available in the
Meeting
Organizer. In this picture, the busy times are shown as a solid
blue bar.
Your personal contacts may not have an
online calendar available for viewing unless
they choose to
publish that information with a service, such as
Microsoft’s .net.
4. Make a Meeting
A Group Schedule makes it easy to invite everyone to
a meeting. Click on Make Meeting, then New Meeting
with All to send a meeting request to everyone on your Group
Schedule.