Hi,  Yes, it's supported.  This is listed on the e-lab :  The Celerra AntiVirus solution requires the following three components: *Celerra AntiVirus Agent (CAVA) provided by EMC running on AV server (or Windows Workstation for McAfee VirusScan 8.0i ). *AV server is the Win NT/2k/2k3/2k8/2k8R2 server (or Windows Workstation for McAfee VirusScan 8.0i ) configured with CAVA and 3rd party AV software.  Gustavo Barreto.
Can't seem to find the support matrix for CAVA and had to request access to CAVA downloads.  We are rebuilding our CAVA servers and our standard build is Windows 2008 R2 Enterprise Edition.  Don't know if OS is supported?
Is CAVA supported on Windows 2008 R2 Standard and/or Enterprise?