VMS Help DCE_SECURITY, Admin Intro, DCE$EXPORT, ADD, /EXCLUDE, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  principal

     Specifies the DCE principal name to be added to the EXPORT
     exclude list.

     If the principal name contains lowercase characters,
     spaces, or other special characters, enclose the entire
     string in quotes.