We contain a little SBS network (10 clients) depending on SBS 2003. Presently we encompass a SBS Suite license which is on to run out. We want to advance to SBS 2011 and Avast 6 on top of the client. Is there any options? I recognize that the latest SBC is not prepared, except there are a few plans to make on hand a latest SBS Suite license which contains Avast 6 used for the client? Otherwise do we have to purchase 10 CALs for SBS server version and a 10 license pack for Avast 6? Does the older SBS Server version run on SBS 2011?