Zoho Subscriptions & Zoho CRM Products

Zoho Subscriptions & Zoho CRM Products

Hi, 

Why are my Zoho Subscriptions Products are not available in  Zoho CRM Products ?

Therefore, it means that I can not generate a quote from CRM & validate the sale + subscription invoicing through Zoho CRM ?  
It completely breaks the Zoho ecosystem added value for the salesteam