http://blogs.msdn.com/dgoldman/archive/2009/04/08/full-oab-downloads-caused-by-mis-configured-anti-virus-software-settings.aspxOver the last few months I have seen a rash of calls come in where clients were being forced to download a full.  Full OAB downloads can cause very high network usage and cause more havoc than anything. Typically in these situations it is prettyen-USCommunityServer 2.1 SP1 (Build: 61025.2)