Related to https://github.com/spring-projects/spring-ldap/issues/633, it would be nice if Spring Boot picked up a ObjectDirectoryMapper bean:

@Bean
@ConditionalOnMissingBean(LdapOperations.class)
public LdapTemplate ldapTemplate(LdapProperties properties, ContextSource contextSource, 
        ObjectDirectoryMapper objectDirectoryMapper) {
        // ...
    LdapTemplate ldapTemplate = new LdapTemplate(contextSource);
    ldapTemplate.setObjectDirectoryMapper(objectDirectoryMapper);
    return ldapTemplate;
}

As of Spring LDAP 3.3.0-M2, Spring Boot can import ObjectDirectoryMapperConfiguration to publish a ObjectDirectoryMapper bean.