How to configure Exchange Server in high availability in Hosting Controller Panel

Question: How to configure Exchange Server in high availability in Hosting Controller Panel
Answer:
 
Highly recommended for big enterprises and telcos;
In order to achieve Exchange High Availability, insert fail-over IP address or mail server public address (mail.domain.com) in the HC Panel > Exchange Configuration Setting to connect Exchange Server remotely via PowerShell.
Make sure basic authentication is enable on PowerShell virtual directory in the IIS Manager as explained in this Article