I am running Exchange 2007 SP1 in a 3 node active/active/passive config. In the registry, there is a value called "OABDropFolderLocation". This value is located in HKLM\system\currentcontrolset\services\msexchangesa\parameters\{cmsname}\. Does anyone know exactly what this path should refer to?

Did you see this: http://technet.microsoft.com/en-us/library/bb232121.aspx "...Explanation This error event indicates that the Registry value "OabDropFolderLocation" is missing or is set to a non-existent path. User Action To resolve this warning, try one or more of the following: Make sure that all single copy cluster nodes are running a released version of Exchange Server 2007. For more information about managing single copy clusters, see Managing Single Copy Clusters. Make sure that all shared storage is online..."

Yes, Ive seen this. What I was looking for is an actual answer of where it should be pointing. I have moved physical disks around in my cluster and i do not recall exactly what the original drive location was.