Meeting request problem

[Chris]

I am working on MS Exchange Server and we are using Outlook 2000. Sometimes
when I send out a meeting request certain people accept it and I receive the
notification. Here is the strange part. When they go to their calendar to
view the meeting, when they open it up, they get the option to accept it or
decline it again. What gives? I thought that once you accepted it, then it
would show up on your calendar then that was it. Any ideas would be
helpful.

Thanks