Please use plaintext email only. This thread is mostly unreadable due to the multiple escapes and other garbage.
You're talking about QQ (single quote ' mentioned in comment as %x27) an= d QS (back-slash mentioned in comment as %x5C).
AFAICS the double quote is %x22 and is included in QUTF1.
Yes, DQUOTE is included in QUTF1 but that is not the issue here. The slapd.conf(5) syntax says explicitly that double quote is used to enclose arguments containing white space. Single quote has no significance to the slapd.conf parser. Arguments containing double quote that are meant to be taken literally must escape the quote with a backslash.