Obviously, the ldap-plugin is unable to create new entries in the configured LDAP server:
Error writing entry nb203629 to member 2 (ldap-sync): LDAP Error: Internal (implementation specific) error
Mapping Write Error: LDAP Error: Internal (implementation specific) error
The LDAP logs shows this:
conn=47 op=18 ADD dn="uid=nb203629,ou=people,dc=example,dc=com"
Jun 24 19:37:08 elwood slapd[22079]: is_entry_objectclass("uid=nb203629,ou=people,dc=example,dc=com", "2.5.17.0") no o
bjectClass attribute
Jun 24 19:37:08 elwood slapd[22079]: No structuralObjectClass for entry (uid=nb203629,ou=people,dc=example,dc=com)
Jun 24 19:37:08 elwood slapd[22079]: conn=47 op=18 RESULT tag=105 err=80 text=no structuralObjectClass operational
attribute
There should be a configuration tag to provide the objectclasses for new entries.