SA is a program offered by Microsoft that helps users get the most out of their software products and improve IT productivity. If you have SA for SQL Server, it can help you manage and deploy the software more efficiently and improve productivity. It also allows you to easily add additional hardware or licenses as needed and combines current and future version licenses under the core licensing model. SA customers also get access to the latest versions and options for virtualization, as well as high availability and disaster recovery at no extra cost.