Kerio Control Offline License File May 2026

To register Kerio Control using an offline license file (typically a

file), you must manually download the license from the GFI/Kerio registration portal and then import it into your Kerio Control administration interface. Step 1: Download the License File

If your appliance cannot reach the internet to activate automatically, you must generate the file from a machine with internet access: Navigate to the Kerio Product Registration page Enter your purchased license number and the captcha code shown on the screen. Kerio Control Offline License File

Verify your company and registration information in the following steps. Select the correct Operating System for your instance. and then select Download the License to save the license.key file to your computer. Step 2: Import the License into Kerio Control Once you have the

file, follow these steps within your Kerio Control administration interface: Log in to the Kerio Control Administration interface (typically To register Kerio Control using an offline license

Step 3: Generate the Offline License File

Find your product (Kerio Control) in the list of licensed items.
Look for an option called “Generate Offline License” or “Manual Activation”.
Enter the System ID / Product ID obtained from your firewall.
The portal will generate a .lic file for download.

Note: Some legacy versions require you to contact support to generate an offline license file. GFI may provide it via a secure email attachment.

How it’s obtained

From the vendor portal: generate an offline license in the customer account (MyKerio or vendor management console) and download the file.
From vendor support: provide appliance serial number and request an offline license; support will provide the file (often by email or secure download).

The "Time Bomb" Issue

Kerio Control uses system time to validate the license. If your offline server's CMOS battery dies and the date resets to 2010, the firewall will think the valid license is expired. Always sync your offline server’s clock via NTP (even if just to an internal stratum server) before importing the license. Step 3: Generate the Offline License File

Part 5: Pros and Cons of Offline Licensing

Administrators love offline files for specific reasons, but they come with caveats.