Microsoft add wording to the May 2018 Product Terms document to explain some of the key terms associated with Azure Reserved Instances: Exchange, Cancel, and Reassignment. Find the detail on page 50.
Microsoft announce that Reserved Instances are immediately available through the Cloud Solution Provider (CSP) program and that Server Subscriptions will be available in the near future. These two offerings will be perfect partners since they will allow customers to enjoy the very best prices for virtual machines running in Azure.
Reserved Instances are a way for customers to pay for the compute part of a virtual machine and Server Subscriptions for Windows Server and SQL Server will enable customers to acquire a subscription for the software to run in their virtual machines. Both offerings are paid for upfront for a 1 or 3-year term, and used together may enable customers to save up to 80% compared to the price of an equivalent virtual machine paid for on a consumption basis.
There are plenty of resources available if you want to find out more and this page (http://bit.ly/2jYx23P) includes links to an FAQ, an overview presentation, a webinar and a sales sheet. It’s definitely worth a look!