You should need to tick the Secure tick box to enable LDAPS and match the port that is used by AD for LDAPS. You will also need to import the CA and intermediate CA certificates from AD into your truststore.
Thanks handat, the first part actually is ok, but the second part of importing the CA and intermediate CA Cert. from AD is what I need a guide for, can you please help me finding a clear step-by-step guide to achieve that part ??
All you need to do is use keytool to import the certificates, eg:
keytool -importcert -trustcacerts -file <signed cert.cer> -alias trustcert -keystore <keystore file such as cacerts> -storepass <storepass>
You should be able to get the AD team to give you the certificates, otherwise, just use openssl to retrieve them.
Thanks again handat, I'll test that and update the thread back.