From the admin menu, open the license section
This will display a table showing licenses already registered
Copy and paste your license key and press Apply license key
A key will define the following:
Once the key is applied, you will be allowed to create connectors of the associated types
If a license becomes invalid because it has expired or is not matching the instance IP, the monitoring will stop
CAUTION : If you delete a key, all associated connectors will be removed from the configuration
NOTE : Only instance with primary server role (see instance roles) need to have a license installed