Office365
Set work hours/timezone for Resource Rooms
Connect to Office 365: Set-MailboxCalendarConfiguration -Identity "<room name>" -WorkingHoursStartTime <start time> -WorkingHoursEndTime <end time> -WorkingHoursTimeZone "<timezone>" Live example: Set-MailboxCalendarConfiguration -Identity "Conf Room_One" -WorkingHoursStartTime 07:00:00 -WorkingHoursEndTime 20:00:00 -WorkingHoursTimeZone "W. Europe Standard