win7 unable to join openldap domain: LDAPMessage searchRequest(4) "<ROOT>" baseObject

my Win7 machine is unable to join my linux openldap domain. In wireshark I can see that win7 machine sends CLDAP search message to openldap with the following parameter:

LDAPMessage searchRequest(4) "ROOT>" baseObject

protocolOp: searchRequest (3)
searchRequest
baseObject:
Filter: (&(&(DnsDomain=mydomain.com)(Host=ZAK))(NtVer=0x00000016))
.....................................

AttributeDescription: Netlogon


However, in my LDAP entries none of the search attributes (DnsDomain, HOST,NtVer) exist. Any advice is very welcome. Thank you very much.

I solved this issue by uninstalling openldap and samba3 and installing samba4. Samba4 plays the role of ldap and active directory. Windows machines are now able to join the linux domain.