Thanks a lot for the fast response.

I know this paper, but it does not really help or I do not understand the step in section 2.
I have a structure similar to the discribed structure.
But it is not possible to put a entry like
dn: sambaDomainName=xxx,dc=server,dc=com
in LDAP.
Because is not a LDAP conformal map.
When I do that I got

warning: no attributes to add (entry="sambaDomainName=xxx,dc=xxx,dc=xx")
adding new entry "sambaDomainName=xxx,dc=xxx,dc=xx"
ldapadd: Protocol error (2)
additional info: no attributes provided

Any suggestion?