Assume that you enable the Resource Booking Attendant on a resource mailbox in a Microsoft Exchange Server 2010 environment. You configure the Resource Booking Attendant to accept resource requests automatically. When you send a meeting request that contains custom code or script by using Microsoft Outlook, the Resource Booking Attendant does not process the resource request. Therefore, you cannot reserve the room that you selected in the meeting request.
To resolve this issue, install the following update rollup:
2685289 Description of Update Rollup 3 for Exchange Server 2010 Service Pack 2
For more information about how to enable or disable Automatic Booking on a resource mailbox, go to the following Microsoft website: