This article addresses some behaviors specific to Microsoft Small Business Server (SBS) that the administrator needs to know about when installing the Barracuda Web Security Agent (WSA) using a GPO.
To install the Barracuda WSA using a GPO to push it out to remote clients, refer to either of these two articles for information about
After completing GPO installation steps, the client computers will have the Barracuda WSA installed after a reboot. But in Active Directory, when pulling the computer back into the 'SBSComputers' OU, remote access services from the server side are no longer available. The server cannot connect to the client, even if the client still shows up in the console. You must remove the client from that folder and re-join it to the DC in order to re-establish the trust relationship.