The license key comprises of two key parameters: device count & expiry date.Device count should be equal or more than the number of managed devices in the network, and is a sum of the total number of Access Points and Controllers.
If the license count is insufficient or the licenses have expired, a warning message is displayed on the NSight UI for a period of 60 days. After 60 days, the NSight User Interface is shut down. After the UI is shut down, NSight server will continue to collect statistics and write information to the database. Once required licenses will be added NSight UI will resume normal operation.