Please be aware that this feature is supported starting with the 9.4.2 release.
This article describes how to access Kerio Connect mailboxes in Multi-Server setup.
All users, regardless of their home server, access their account through the front-end server address. Kerio Connect Multi-Server directs the connection to the user's back-end server automatically.
Use the front-end server address when accessing and configuring all email clients, for example, Kerio Connect Client, Microsoft Outlook, and so on.
Cross-server sharing is available for Kerio Connect Client users and users with Kerio Outlook Connector (Offline Edition).