I think the answer is no, but I've not seen the simple question and the simple answer. I want to run an application which requires IIS to be running in 32 bit mode. Will this break Exchange 2007? To be clear I'm referring to setting this metabase to TRUE: W3SVC/AppPools/Enable32bitAppOnWin64 Thanks, -p

Here is the simple answer If the Exchange Analyzer determines that the value for the w3svc/AppPools/Enable32BitAppOnWin64 metabase property is set to 1 (true), the Exchange Analyzer displays an error. This error indicates that IIS is configured to create 32-bit worker processes on a 64-bit Windows server that is running Exchange 2007. This configuration will cause the Exchange 2007 virtual directories to become dysfunctional. http://technet.microsoft.com/en-us/library/bb508906.aspx Deli