Heads up to anyone else as well who are using ldap queries to domain controllers.
https://support.microsoft.com/en-us/help/4520412/2020-ldap-channel-binding-and-ldap-signing-requirement-for-windows
Anyway the issue is I can't get TLK communication working with the ldap server. It will throw an error:
Could not connect to xxxx:636:389: Unable to bind to server xxxx:636
I tried with assigning port :636 and using default (no port). Same error. Without TLS all works fine.
Anybody have any ideas?