Exchange Calendar as a Meeting Resource

[Jonchill]

I have setup some public folders for our meeting rooms and also out projector etc.

I can e-mail the public folder OK, but if the particular time is taken it just puts the new request along side the existing request and not respond to the user saying that the resource is already in use for that period.

How do I go about configuring them so that they can be used as a meeting resource?

Any help would be much appreciated.

Thanks

Jon