Library /sys$common/syshlp/dns$cphelp.hlb change, subtree, access, example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 The following command changes the old principal .pjl.smith to the
 new principal .ins.smith in all ACEs associated with the .admin
 directory and its contents. By using the recursion notation (...),
 the command additionally changes the ACEs of all child directories
 and their contents.

 dns> change subtree .admin... access .pjl.smith .ins.smith