To accept an invitation to a Collaboration Meeting, in
the Invitation dialog box, click the Accept button.
A message is sent to the creator of the meeting indicating that you have
accepted his / her invitation. You are now considered to have joined the
To refuse the invitation, press the Respond
button, enter your answer in the text-entry field of the Instant
Messaging dialog box that appears and press the Send
The message is sent to the creator of the meeting explaining your reason
for not accepting the invitation.
To ignore the invitation, press the Close
The dialog box will be closed.