To obtain a paper copy of your Kerio Control license key , you must first register your product or trial on the official portal to receive the digital file, which you can then print or save as a record. How to Obtain Your License Key
/opt/kerio/control/bin/kerio-control-license --info | grep expires kerio control license key
3. The Hidden Dangers of "Free," Cracked, or Shared License Keys To obtain a paper copy of your Kerio