meta backend , rwm AD source , uppercase to lowercase

[Nicolas Renault <nicolas_renault@yahoo.fr>]

Hello,

My question,

I have a meta backend that work perfectly but on the dev team somebody 
ask me :

Why on AD this organizationalUnit have these valuies on  attrs :

managedBy: CN=Surname Name,OU=Users,DC=domain,DC=fr
seeAlso:        CN=Sunrame2 Name2,OU=Users,DC=domain,DC=fr

and on meta on the same OU :

managedBy: cn=surname name,ou=Users,ou=meta,dc=domain,dc=fr
seeAlso:        cn=Surname2 Name2,ou=Users,ou=META,dc=domain,dc=fr

the AD is "bind" to ou=META,dc=domain,dc=fr  ( suffixemassage)

all OU on meta have the same behavior

so

* why on managedBy attr all is modified in lowercase and only CN and OU 
on seeAlso ?
* how work uppercase to lowercase with meta backend  ? is overlay rwm 
implicated ?

my meta backend config is very long but somme informations

moduleload      back_meta
moduleload      rwm
moduleload      valsort
moduleload      memberof
moduleload      dynlist
moduleload      sssvlv.so
moduleload      collect
moduleload      pcache
moduleload      back_monitor
moduleload      back_ldap
moduleload      back_mdb

overlay                 rwm
rwm-rewriteEngine on
rwm-normalize-mapped-attrs yes
... lot of rewrite rules

etc.

version :
@(#) $OpenLDAP: slapd 2.4.44 $
    opensuse-buildservice@opensuse.org

openSUSE Leap 42.2

thanks for your answers.

Nicolas