Library /sys$common/syshlp/mailhelp.hlb REPLY, Qualifiers, /CC_PROMPT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /CC_PROMPT
       /NOCC_PROMPT

    Enables the prompt for the CC: line in the mail header. At the
    CC: prompt, enter the names of other users to whom you want to
    send a copy of the mail message.

    The /NOCC_PROMPT qualifier disables the CC: prompt. The /CC_
    PROMPT and /NOCC_PROMPT qualifiers override the SET CC_PROMPT and
    SET NOCC_PROMPT commands.