A built-in license is assigned automatically to the Management Server, Security Server, and Messaging Server in your Windows EBS network. Other servers in the domain are also assigned a built-in license. You do not need to assign a client access license (CAL) for Windows EBS to any of these servers, and you cannot unassign the built-in license.
The built-in license allows any user to log on to the network from that server.
It may take up to two hours for a built-in license to be assigned after you join a server to the domain. To verify that a server has a built-in license assigned, in the Administration Console, click the Licensing tab, and then click Device Licenses.