Exchange Server not available while creating a new Exchange Organization in HC10 Panel

When I try to create a new exchange organization with a mail domain, the exchange server shows as disabled in the mail domain creation page. I have also checked Exchange Server Connectivity in the HC10 Panel and it is fine but the issue is still present.

Make sure that you have sold quota of Exchange Service Plan from : Service Catalog >>  Service Plans >> Sell Plan to the customer for whom you are trying to add Exchange Mail Domain.