setting up LDAPS on ESET SMC v7

[KGAIBERIA 1]

Good morning,

I am using ESET Virtual Appliance.

I am following this documentation to change my Active Directory connection to LDAPS https://help.eset.com/protect_deploy_va/80/en-US/configure_ldaps_connection_to_a_domain.html 

As prerequisite you said "

Prerequisites

•Set up LDAPS on the Domain Controller - make sure to export the DC Certification Authority public key.

"

My problem is that when I try to export the domain controller certificate, the option "export public key" is dissabled. can I use this certificate on the VA Server? My Domain Controller is a Windows Server where I installed AD CS. 

Thank you