When we were using Office 2007 & 2010 everytime we would book a meeting and a resource was currently booked by someone else we would get this "Resource name is already booked for the specified time. You must use another time or find another resource." when i click on send.

Was that feature removed with office 2013? I get a confirmation or rejection email when I book a resource which is causing double booking issues because our employees are not paying attention to the email.