I use outlook 2007, when I receive a meeting request, instead of having the green tick button and the red cross at the top of the email request I have a blue button saying no response required. I click on it, the requests disappears, I go to the calendar to open the meeting. In the meeting I can accept, decline or modify it. If I accept it it disappears totally from the calendar!!! This is immediate. It also disappears from zimbra online.

Please help I can't manage my calendar. Thanks a lot,
J. Maier