Library /sys$common/syshlp/dce$uaf_help.hlb MODIFY, Qualifiers, /FLAGS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /FLAGS=([NO]keyword[,...])

    Changes the special attributes that are stored with the
    DCE$UAF record. There is no default value.  The keywords you can
    specify are:

    Keyword        Description

    DCE         	  Specifies that the OpenVMS account being defined has
 		  a corresponding DCE account.

    NO_DCE         Specifies that the OpenVMS account being defined does
                   not have a corresponding DCE account. In this case
                   dce-name is ignored.

    Only those flags that are specified are changed; all other flags
    remain unchanged.  In order to remove a flag, use the negated form.

    If you specify the DCE flag, you must specify a DCE name for
    this entry in dce-name.