Security

Kerio Control License Renewal: How to Renew and Activate Your Subscription

What to collect before renewal, how to choose the correct subscription, and how to update an online or offline Kerio Control appliance after purchase

7 min readUpdated 22 August 2026

A Kerio Control renewal should be treated as an entitlement and configuration task, not just a product search. The correct subscription depends on the existing appliance or software deployment, user band, included components and term. Once renewed, the appliance may need a manual licence update before the new entitlement is shown. This guide condenses GFI’s current renewal and registration documentation into a practical buying and activation checklist for businesses, MSPs and resellers.

What to collect before you renew

Start with the existing licence number, the organisation name registered to it and the previous invoice where available. GFI’s renewal guidance asks customers to provide those details to their reseller or, where necessary, GFI Sales. They are the fastest way to match a renewal to the existing entitlement and avoid ordering an incompatible user band, appliance family or service term.

Also record the Kerio Control deployment type: hardware appliance, software appliance or virtual appliance; the model if hardware; current user count; expiry date; whether antivirus and Web Filter are included; and whether high availability is in use. The purchase decision should reflect the deployed product, not only the firewall’s hostname or a remembered product family.

The current status and licence usage are visible in the Kerio Control administration interface. GFI explains that a basic server licence includes an admin account and ten user accounts, with additional users licensed in groups of five. Confirm the actual concurrent user requirement before selecting a renewal or an expansion.

  • Current Kerio Control licence number and registered organisation
  • Appliance type and exact hardware model, where applicable
  • User band, subscription term and optional services currently in use
  • Expiry date and whether a renewal gap has already occurred
  • Previous invoice or original reseller details, if available

Choose the correct Kerio Control subscription

Kerio Control subscriptions are not interchangeable across every deployment. Match the product to the appliance family or licence type already in use, then confirm the user band and term. A quote request should include the old SKU or licence number wherever possible; that lets the supplier identify whether the requirement is a straightforward renewal, an additional-user licence, an upgrade or a migration project.

GFI lists Kerio Antivirus and Kerio Control Web Filter as individually licensed optional components. Check what is included in the entitlement being renewed rather than assuming that a short product title includes every service. Its licensing documentation also notes that software maintenance affects access to later updates, so renewal timing should be considered alongside the organisation’s patching and support policy.

FUSE lists live Kerio Control renewal and subscription products, including the <a href="/product/detail/KCL100REN-1Y">KCL100REN-1Y renewal</a>. Use the exact current entitlement to select a SKU; if you are unsure, request a quote with the licence number and appliance details instead of ordering a similarly named product.

  • Match hardware model or software/virtual licence type first
  • Confirm the current user band and desired subscription term
  • Check whether antivirus and Web Filter are included in the requirement
  • Treat an upgrade, migration or high-availability change as a design check rather than a simple renewal

Renew through a reseller, then update the appliance

GFI directs customers to their reseller for renewal. If the original reseller cannot be contacted, GFI provides a route to find another reseller or contact Sales. An expired licence cannot simply be re-used in the activation wizard; the renewal has to be purchased before the renewed entitlement can be applied.

After a renewal is processed, the new details may not appear immediately in the Kerio Control web administration interface. GFI’s registration instructions explain how to force the update: open the administration interface, go to Dashboard, open Configuration Assistant, select Register product, then use the licence or update option as appropriate. Review the displayed licence details before finishing the wizard.

Keep a dated record of the renewed SKU, invoice, licence number and appliance serial or deployment details. That makes the next renewal, an audit or a support case much simpler and avoids confusion where multiple customer appliances are managed by one MSP.

  • Purchase the renewal against the existing entitlement
  • Use Configuration Assistant to register or update licence information
  • Confirm the updated expiry and enabled services on the Dashboard
  • Record the renewed entitlement and renew-before date in the support system

Offline activation when the appliance cannot reach the internet

A disconnected appliance can still be renewed. GFI documents an offline method: register the purchased licence through the Kerio Product Registration page, download the resulting license.key file, then import it in the administration interface. The documented path is Dashboard, Configuration Assistant, Register product, then Register offline by license file.

Plan this before an air-gapped or restricted site reaches expiry. The administrator needs a secure workstation that can reach the registration service, a safe way to transfer the file to the appliance, and confirmation that the file belongs to the intended licence. Keep the file with the licence record under the organisation’s normal access controls.

  • Register the purchased licence from a connected workstation
  • Download the license.key file from the official registration process
  • Import it with ‘Register offline by license file’ in Kerio Control
  • Verify the new licence details locally after import

Renewal, migration and high availability are different tasks

A renewal normally preserves the existing deployment. Moving a licence or replacing a firewall can introduce restrictions. GFI states that licences can move between two virtual appliances, two software appliances, or hardware appliances of the same type, but not freely between hardware and software/virtual appliances or different hardware types. Ask for licensing guidance before treating a hardware refresh as a routine renewal.

For high availability, GFI’s licensing documentation says the master and slave appliances need the same licence keys; different keys cause synchronisation failure. Include HA topology and both appliance models in any renewal or refresh request. For a migration, plan a tested configuration export/import and a clear cutover window rather than assuming the old and new systems can run the same licence indefinitely.

Buy Kerio Control renewals from FUSE

FUSE can help identify the correct renewal or subscription product from the existing licence and appliance details. Include the current licence number, appliance model or deployment type, user band, term and whether Web Filter or antivirus services are required. That lets the request be checked against the correct entitlement instead of relying on a generic product search.

For firewall lifecycle planning, see the <a href="/guides/firewall-buying-guide-eu-smb">FUSE EU SMB firewall buying guide</a>. If the renewal is part of a replacement, migration or HA change, describe the current topology and required maintenance window so the licensing question and hardware design can be handled together.

Frequently asked questions

How do I renew a Kerio Control licence?

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GFI directs customers to renew through a reseller. Provide the current licence number, organisation details and previous invoice where available. After purchase, use Kerio Control’s Configuration Assistant to register or update the licence information.

Can I reuse an expired Kerio Control licence file?

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No. GFI states that an expired licence cannot be reused in the activation wizard. Purchase the renewal first, then apply the renewed entitlement through the documented registration or update process.

Why is my renewed Kerio Control licence not showing on the appliance?

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The renewed details may not appear immediately. In the administration interface, open Dashboard, Configuration Assistant and Register product, then use the licence or update option to force a refresh. Confirm the displayed licence information after the wizard completes.

Can I renew Kerio Control when the appliance is offline?

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Yes. GFI documents an offline method: obtain a license.key file through the official registration process and import it with ‘Register offline by license file’ in the Kerio Control administration interface.

How many users does a Kerio Control licence include?

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According to GFI’s licensing documentation, the basic server licence includes an admin account and ten user accounts; additional users are licensed in groups of five. Confirm the live deployment requirement and user band before renewing.

Can I transfer a Kerio Control licence to a different appliance?

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It depends on the deployment types. GFI documents transfers between virtual appliances, software appliances, and hardware appliances of the same type, with restrictions for moves between hardware and software/virtual appliances or different hardware models. Treat a migration as a licensing check, not just a renewal.

Can FUSE help identify the correct Kerio Control renewal?

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Yes. Send the current licence number, appliance model or deployment type, user band, term and required services. FUSE can help match the entitlement to the correct renewal or subscription product.

Browse Kerio Software on FUSE

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Primary sources

Technical and regulatory claims in this guide are checked against these first-party references. Product availability and regional variants should still be confirmed before ordering.

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