I've tried to convert my old config file to the new syntax for the idmap backend

The current configuration is: Active Directory (domain: DPTINFO) for users, an openldap server on the samba host which storeq the mapping, and I use the ldap backend to make the job.

I'm unable to get a working configuration using the document explained in idmap_ldap

Here the relevant part:
========================

idmap uid = 10000-200000
idmap gid = 10000-200000
# old syntax needed to make the search work.
idmap backend = ldap:ldap://oie.u-strasbg.fr/
ldap suffix = dc=iutinfo,dc=local

idmap alloc backend = ldap
idmap alloc config:ldap_url = ldap://oie.u-strasbg.fr/
idmap alloc config:ldap_base_dn = ou=Idmap,dc=iutinfo,dc=local
idmap alloc config:ldap_user_dn = cn=admin,dc=iutinfo,dc=local

idmap config DPTINFO:backend = ldap
idmap config DPTINFO:ldap_url = ldap://oie.u-strasbg.fr/
idmap config DPTINFO:ldap_base_dn = ou=Idmap,dc=iutinfo,dc=local
idmap config DPTINFO:ldap_user_dn = cn=admin,dc=iutinfo,dc=local

winbind enum users = yes
winbind enum groups = yes
winbind separator = +
winbind use default domain = yes
template homedir = /data/home/%U
template shell = /bin/false

========================


I've stored secrets with "net idmap secret alloc XXXXXX" and "net idmap secret DPTINFO XXXXXX" 

I didn't have the two lines at beginning:
>  idmap backend = ldap:ldap://oie.u-strasbg.fr/
>  ldap suffix = dc=iutinfo,dc=local
and winbind was failling with "ERROR: missing idmap ldap url"
When I added the first line, winbind was able to look into the ldap.
But it couldn't store values, the result of ldap_add was :"invalid DN"
With the second line, winbind could add values in the idmap ou.


I think this part of idmap documentation is very important, tu understand what is hapenning.