As part of our submission process we collect the version of Reader/Acrobat that was used. We do this using xfa.host.appType, and the app.plugIns[x].version. We test our forms with versions of Reader from 7.0.9 to 9.0 and Acrobat 7.0 to 8.0. The xfa.host.appType for these is Reader or Exchange-Pro.
Does anyone know what program has a xfa.host.appType of Exchange.