One License is required per SQL Server Instance.

Unlimited License
The SQL Elements unlimited license type allows an unlimited number of SQL Server instances to be registered with a single install. Performance characteristics of your particular installation environment may limit the actual number of instances that can be monitored.

Maintenance
Maintenance includes access to email support and includes product updates for the defined period of the agreement.
Maintenance may be renewed annually and will be calculated based upon 20% of the then current list price for the product license at the time of renewal.

Important: Please note that there may be a delay before you can use this software as a unique License key needs to be generated using your order details.