Our Engineering Team is working closely with Microsoft and has provided an update last week that the fix for RFE 1136213: Implement channel binding tokens for LDAP with StartTLS is tentatively scheduled for ONTAP 9.10. As paul_stejskal mentioned, please work with your Account Team if you need this fixed earlier.
If you need this fixed, I would recommending talking to your account team. They can help prioritize this if needed if this is going to break things for you.
Our Engineering Team is working closely with Microsoft and has provided an update last week that the fix for RFE 1136213: Implement channel binding tokens for LDAP with StartTLS is tentatively scheduled for ONTAP 9.10. As paul_stejskal mentioned, please work with your Account Team if you need this fixed earlier.