If you've bought a license from our webshop: You will receive a mail with your license key. Register an account at admin.getmeetio.com and register your license key under “License management”.
To see your licenses and their validity information at any time, just login to your Meetio Admin account and navigate to “License management”.
If you have bought a hardware bundle: Your license is already allocated to your serial number and you don't have to do anything except register your device at admin.getmeetio.com.