Please share the details as following
Windows OS version ? Architecture 32bit / 64bit ?
Outlook version 32bit / 64bit ?
Scalix Connector Version, architecture and build ?
Also please try latest scalix connector version 18.104.22.16853 build 7 http://downloads.scalix.com/scalix-GA-enterprise-win-latest.zip, if issue will still exist please create a support ticket.
Scalix Support Team