It is a common task in corporate environment

  1. You need to open a user with new meeting room name
  2. Open new user’s mailbox
  3. Go to tools> Options >Calendar options>Resource schedule
  4. Mark the sections bellow

That is .

NOTE: In Exchange 2007 there is ability to create resources (Not Users) You can also set the resource capacity now! Eg: in one of your meeting room, only be able to fit 10 people, you can type in resource information, under the property of the object.