Use the DELETE command to remove one or more user accounts. By
    default, stored messages for the accounts are deleted silently.
    To cause unread messages to be returned to their originators as
    undelivered, specify /RETURN.

    Use the /MESSAGES qualifier to delete or return a user's
    messages. The account itself will not be deleted.

    When the USERNAME parameter contains wild card characters, all
    matching accounts within the manager's management group and
    subgroups thereof will be deleted. The /GROUP qualifier can be
    used to further constrain which accounts are deleted.