1. To upgrade your Kerio license renewal you must access the client portal and login with your details.
2. If you already own a Kerio license (5GB, 10GB, 15GB) and want to upgrade the number of users you can simply click on .
3. Click on Upgrade/ Downgrade.
4. If you don't own the license, then you will need to order a new license here, once you receive the confirmation email type: https://yourserveraddress/admin on your web browser and add the new users.