Overview

Kerio Connect Antivirus updates fail to download due to plugin issues or the SSL certificate not being verified. When the plugin update fails, the following message appears in the Debug log (when the Antivirus Checking option is enabled)

Bitdefender_plugin: Failed to verify SSL certificate

Also in this scenario, the following entries appear in Error/Warning logs:

This article provides instructions on how to update Bitdefender when you receive the above error messages.

Prerequisites

Admin access to Kerio Connect server 

Resolution

Check any firewall rules that could be preventing HTTPS connections. If this does not fix the issue, temporarily disable the certificate validation of the update server by following the steps below:

1. Stop Kerio Connect.

2. Browse to the Store Directory location, depending on your OS.

3. Open the mailserver.cfg file in a text editor (open as Admin).

4. Search for ValidateUpdateServer in the mailserver.cfg file.

5. Set the value of ValidateUpdateServer to 0, as shown in the image below, and save the file.
   
   

6. Restart Kerio Connect and update the Antivirus.

Validation

The Kerio Connect Antivirus update will be completed successfully.

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