I am just going to read off what the user says verbatim:

When I use the calendar meeting schedule to organize a meeting with anyone, everything is fine until I need to change the time and/or date. Then although other people accept or decline, the old date and time is not always deleted in their calendars so they may not end up with the same meeting scheduled under the old time/date. When meetings are changed alot this gets more than a little confusing.