Browse to the downloaded offline license file on your machine and click .
Kerio Control’s Offline License File turns a dry administrative task into a surprisingly reassuring safety net. If you manage networks where internet access is restricted, intermittent, or tightly controlled, this feature is a pragmatic gem — plain, dependable, and exactly the kind of tool that saves late-night troubleshooting sessions.
Then restart the keriocontrol service:
Even when following the correct steps, license activation can sometimes fail. Here are the most common problems and how to resolve them: Kerio Control Offline License File
Online activation is always the easiest route, but specific infrastructure limitations require the offline method:
To understand the offline file, we must first understand what it replaces.
Environments where outbound HTTPS traffic to activation servers is entirely blocked. Browse to the downloaded offline license file on
: Remember that rebuilding a virtual machine or changing its virtual MAC address will alter the OS Unique ID, invalidating your current offline license file.
: A unique identifier generated by your specific Kerio Control installation.
If the system clock on the Kerio Control appliance is incorrect, it may perceive a newly generated license file as expired or not yet valid. Ensure the hardware clock (RTC) is accurate, or sync the firewall to an internal Network Time Protocol (NTP) server within your isolated network. Then restart the keriocontrol service: Even when following
If you are running Kerio Control as a virtual appliance (on VMware, Hyper-V, or KVM), changing the virtual network adapter settings can alter the virtual hardware UUID or MAC address. This changes the firewall's internal System ID, instantly invalidating your offline license.
The OS Unique ID belongs to a decommissioned or cloned VM instance.
Your unique (purchased from GFI or an authorized reseller).
Click the link for (usually located in the bottom right of the registration window). Click Browse , select the file you downloaded earlier, and click Next .
The process can be broken down into three simple steps: generating the license.key from the GFI portal, transferring it to the isolated instance, and manually importing it via the Configuration Assistant. By understanding this workflow and being familiar with the common errors and their solutions, you can ensure your Kerio Control firewall remains a reliable sentinel for your network, even when it's completely disconnected from the outside world.