I had LDAP working fine in 4.0 with an evaluation 2000-user license.
With the exact same settings, it's not working in 4.1 with a purchased 10-user license. The fatal error is:
[ldap.mapper.entity.LDAPUserAttributesMapper] getUsernameFromAttributes The following record does not have a username: {mailhost=..., mailroutingaddress=mailRoutingAddress: ...}
Does the 10-user limit apply on LDAP synchronization so it fails because we have more than ten users?