Overview

If you are unable to install Kerio Outlook Connector and are getting  Error 28110 or Error 28102  then you are in the right place! This article is aimed at clarifying why you are getting this errors when installing Kerio Outlook Connector, despite the steps in the Kerio Outlook Connector Error 28102 not being applicable to your use case.

Error 28102 - unsupported Office version. Click OK to see the list of Microsoft Outlook versions that are supported.

Solution

This error can happen when you are trying to install Kerio Outlook Connect (KOC) instead of Kerio Outlook Connector - Offline Edition (KOFF)

• KOC was designed in the early days and is compatible only with old versions of Microsoft Office (up until Office 2007), and is no longer supported; it is a legacy edition.
• KOFF is the one that should be installed and used with modern Office versions

In order to make sure you download the correct edition:

1. Navigate to download.kerio.com
2. Select the required Kerio Connect version from the drop-down and make sure you select Kerio Outlook Connector - Offline Edition:
   
3. Make sure that the installer filename contains kerio-connect-koff;
   • Legacy editions (KOC - the ones not supported) will have kerio-connect-koc in the filename, and should not be used

Summary

Error 28102 is often times caused by an incorrect installer being used, namely the installer of the legacy Kerio Outlook Connector (KOC) software, instead of the modern, supported Kerio Outlook Connector - Offline Edition (KOFF).

FAQ

1. What is the difference between KOC and KOFF?
   KOC is the Kerio Outlook Connector, compatible with older versions of Microsoft Office and is no longer supported. KOFF is the Kerio Outlook Connector Offline, which should be used with modern Office versions.
2. Where can I download the correct installer (KOFF)?
   You can download the KOFF installer from download.kerio.com