Home to atthedatacenter.comThis shows the available properties of the User. Note some new options in the user properties.See more explanations are here:http://technet.microsoft.com/en-us/library/aa998877(EXCHG.140).aspx?v=14.0.639.11&t=exchgf1
The Calendar Attendant processes meeting requests as they come in, even if users are not currently logged on by means of a client such as Outlook. Meetings are automatically placed on the calendar as “Tentative” so timeslots won’t be overbooked. You can use the Calendar Attendant to accept and decline requests for users
A view of OWA in Exchange 2010.
The new Exchange Control Panel (ECP) Reached by https://domainname.com/ecp
Hope it helps