You can add the licenses when you are installing License Server. After the license server is installed, you can add licenses by using Management Console, as follows.
To add one or more license keys to the license server
Run Management Console.
Click Licenses. If the license server is installed on a different machine, click Connect to License Server, and then type the name or IP address of that machine.
Click Add License.
In the Add Licenses window, type the license key or the path to a .txt or .eml file containing the license keys; or, you can browse to the file.
Click Add. License Server performs the operation and reports the number of newly-added licenses.
The license server has 10 license keys of various types. The license corresponding to the highlighted license key has already been used for deployment.