The KKB states
"Kaseya Antivirus (KAV) module, using the Kaspersky Workstation 6 and Server 6 engine, do not support Windows 8 or Windows Server 2012. At the time of writing, Kaspersky is developing Workstation 10 and Server 10 and will include support for both Windows 8 and Windows Server 2012 in that release. Kaseya Engineering is actively working on an update to the KAV module that will support the new Kaspersky engine. We are working towards a parallel release of the KAV module to support the updated Kaspersky engine at about the same time as the engine is released. The updated Security module is slated to start early Controlled Release in April."
Is it already in Controlled Release? Has anyone tried it out? We are currently using KES, but the old KAV module had more granular control than we get with KES.