exchange server - Get appointments for all rooms -

currently, can appointments 1 room, have many rooms, if want show appointments, performance bad, want ask if has method appointments multiple rooms 1 time?

no there no operation that. can use getuseravailbility operation give freebusy status , subset of calendar property start,end,location,subject if request calendardetails see http://msdn.microsoft.com/en-us/library/office/hh532567%28v=exchg.80%29.aspx . there limitations around operation time window in 42 days , can retrieve max of 100 mailboxes per request.

cheers glen