/FORWARD (default)
       /NOFORWARD

    By default, a forwarding address for each migrated user account
    is established. This forwarding causes undelivered mail sent
    to the user's source message store address to be automatically
    forwarded to their account in the destination message store.

    When migrating an account from VMS MAIL, a forwarding for the VMS
    MAIL user is is placed both in the PMDF alias database and VMS
    MAIL's forwarding database. When migrating from the popstore or
    msgstore, a forwarding to the account in the destination store is
    added to the msgstore's forwarding database.

    When migrating to the popstore or msgstore, any msgstore
    forwarding for the destination account is removed from the
    msgstore's forwarding database. If the account is just being
    converted from popstore to msgstore (or vice-versa) in place, no
    forwarding is necessary.

    Specify /NOFORWARD to prevent forwardings from being established.
    Note, however, that when /NOFORWARD is used, undelivered mail
    directed to the user's old address in the source message store
    can be returned as undeliverable or delivered to the old, unused
    account until such time that the old account is deleted at which
    point the mail will be returned as undeliverable.