The PMDF LICENSE utility is used to activate (load) or deactivate
    (unload) a PMDF license Product Authorization Key (PAK) on a
    given OpenVMS system. The PMDF license PAK must already be loaded
    with the OpenVMS LICENSE utility. However, that is not sufficient
    to activate the license. PMDF's model for debitting license usage
    units (based upon CPU type) differs from HP's. Because of this
    difference, an additional utility-the PMDF LICENSE utility - is
    required to properly debit usage units from a PMDF license PAK.

    Normally the PMDF LICENSE utility is run at system startup by the
    PMDF_STARTUP.COM command procedure. However, it may also be run
    manually. When it is used to unload a license, the usage units
    used by that machine are made available for use by other systems
    in the cluster.

    Note that the use of the OpenVMS LICENSE utility is sufficient
    for loading and activating license PAKs for PMDF-MTA, PMDF-
    DIRSYNC, PMDF-FAX, PMDF-LAN, PMDF-MB400, PMDF-MR, PMDF-MSGSTORE,
    PMDF-POPSTORE, PMDF-TLS, PMDF-X400, and PMDF-XGS. The PMDF
    LICENSE utility does not need to be (and cannot be) used to
    activate license PAKs for PMDF-MTA or the listed layered
    products.