Spring LdapContextSource configuration - constantly getting errors

I've been trying to connect to LDAP for quite a while, but with no success.

The error I'm getting is

ERROR o.s.s.w.a.UsernamePasswordAuthenticationFilter - An internal error occurred while trying to authenticate the user.
org.springframework.security.authentication.InternalAuthenticationServiceException: Uncategorized exception occured during LDAP processing; 
nested exception is javax.naming.NamingException: [LDAP: error code 1 - 000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1 ]; 
remaining name 'dc=2008r2ad,dc=test'

I'm also using the same AD with other program and there is no problem there.

The result I get there is:

I'm trying to use the AD for authentication into my app. The details of the users are then downloaded from DB. I got everything working with an LDIF file. But not with a real AD.

You can see the working ldif configuration commented out:

@Configuration
@ComponentScan
@EnableWebMvcSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    BaseLdapPathContextSource contextSource;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth
                    .ldapAuthentication()
                    .userSearchFilter("uid={0}, ou=anyoffice")
                    .ldapAuthoritiesPopulator(new UserDetailsServiceLdapAuthoritiesPopulator(personDetailsService()))
                    .userSearchBase("dc=2008r2ad,dc=test")
                    .contextSource(contextSource);
//                    .userDnPatterns("uid={0},ou=people")
//                    .groupSearchBase("ou=groups")
//                    .contextSource().ldif("classpath:test-server.ldif");
    }
....

Then there is the contexSource bean definition. In the LdapTemplate bean you can see an attempt to do the bind operation, but I get a different error there and I'm not sure if that is the way to go.

@Configuration
@EnableLdapRepositories
public class LdapConfig {

@Bean
BaseLdapPathContextSource contextSource() throws Exception {
    LdapContextSource contextSource = new LdapContextSource();
    contextSource.setUrl("ldap://10.0.10.170:389");
    contextSource.setBase("dc=2008r2ad,dc=test");
    contextSource.setUserDn("administrator@2008r2ad.test");
    contextSource.setPassword("password");
    contextSource.setAnonymousReadOnly(true);        
    contextSource.afterPropertiesSet();        
    return contextSource;
}

@Bean
LdapTemplate ldapTemplate() throws Exception {
    log.debug("LdapTemplate initialized");
    LdapTemplate template = new LdapTemplate(contextSource());
//        template.afterPropertiesSet();
//        Attributes attrs = new BasicAttributes();
//        attrs.put("uid", "testUID");
//        attrs.put("cn", "testCN");
//        template.bind("ou=anyoffice", null, attrs);
    return template;
}

@Bean
public String userSearchBase() {
    return "ou=anyoffice";
}

}

Any help would be appreciated. I'm here to provide you with any info needed. I guess the problem is with the configuration.