When you open a meeting request you’ve received from someone else, the Meeting tab surprises you with a new group – Respond.
In the Respond group, all you need to do is choose the response you’d like Outlook to send back to the meeting organizer.
Responding to a Meeting Request
Open a meeting request in your Inbox
Choose Accept, Tentative or Decline on the Standard toolbar
Figure 9. Meeting Request Response Dialog Box
3. Choose the appropriate action in the Meeting Request Response Dialog Box
4. Click OK