New and trialing ZOHO and cannot find how to have a product allocated to an account with individual support renewal details (ie per customer renewal dates)?

 

Basically each account could have purchased maintenance on a certain date, for any number of products and need a way of tracking renewal dates for each product / account.

 

I have tried setting the support dates for a product and allocating to an account. However this refers to the global product and seems to require a separate product for each account to have separate support details or am i missing a concept somewhere?