An offline license file for Kerio Control is used to activate the software on machines that cannot access the internet to obtain a license automatically Obtaining the Offline License File To get the file required for offline registration: Kerio Product Registration page Enter your purchased license number and complete the registration wizard. Once completed, download the generated license.key file to your local computer. Importing the License File Kerio Control Offline License File

2. Proxy-Authenticated Environments

If your Kerio Control sits behind a corporate proxy that requires NTLM authentication, the appliance might not be able to reach update servers. While you can configure a proxy in Kerio, some legacy versions struggle. The offline file solves the chicken-and-egg problem. An offline license file for Kerio Control is

To obtain the necessary file, you must use a device that has internet access: Visit the official Kerio Product Registration page. Go to Status &gt

Recommendation: Store backup license files in an encrypted, access-controlled repository.

1. Introduction

Kerio Control is a unified threat management (UTM) solution designed for small to mid-sized enterprises. In modern network topologies, particularly within government, defense, or highly regulated financial sectors, firewall devices often reside in Demilitarized Zones (DMZs) or completely isolated networks (air-gapped networks).

Update Services: Features like Kerio Antivirus and the Kerio Control Web Filter rely on live database updates. Even if the license is applied offline, these features will eventually become outdated unless a secure update path is established.

  1. Go to Status > License Information.
  2. Click on "Offline license..." (The exact wording varies by version—v9.x, v10.x).
  3. A dialog box will appear displaying your Product UID.
  4. Save this UID to a text file on your local machine (e.g., kerio_uid.txt).