The first generation of Kerio Outlook Connector (referred to as KOC) allowed to manage email accounts only if there currently was an online connection between the client and the server.

The new version of the extension, Kerio Outlook Connector (Offline Edition) (referred to as KOFF) provides also the option of managing email accounts in offline mode (when it is not possible to connect to the mailserver). In addition to this function, it provides many improvements, such as searching in message bodies, grouping of email messages and others.