I'm using Unity 4.0 and find the following problem.
One of the user left company and the configuration is listed as below.
Now, a new user with using the same extension as Peter. So I delete Peter's mailbox and re-create as below configuration:
Since Peter not listen all message in his old mailbox, so we find that MWI of Mary's mailbox always turn-on even she listen all messages and deleted.
Is there any proper procedures to delete the mailbox?