How is Veeam Backup & Replication licensed?
Veeam licensing for all products is described here: http://veeam.com/faq.html
You can verify your license key by logging in to www.veeam.com with your credentials: https://my.veeam.com/#/licenses/production. An updated key will be available for all customers with valid and active support contracts.
If you have difficulties retrieving your license file, go to My Account, and open a "Licensing" case to receive assistance from Veeam licensing.
To download Veeam products for trial license, go to https://www.veeam.com/downloads.html. The trial license key is sent to you in email after registering. The trial license is valid for 30 days from the moment of registration.
To obtain a full license key for the desired number of sockets, refer to http://www.veeam.com/buy-end-user.html. The full license includes a one-year maintenance plan.