In old versions of Outlook I could right click and go to the properties of the message to see what folder it is in, but that seems to be missing in Outlook 2013. Anyone know how I can enable this functionality?

Thanks!

I do not know how to bring back that command, but you can display folder location for the selected message using a VBA script like this:

Public Sub ShowFolderForMessage()
    If TypeOf Application.ActiveWindow Is Outlook.Inspector Then
        MsgBox Application.ActiveInspector.CurrentItem.Parent.FullFolderPath
    Else
        MsgBox ActiveExplorer.Selection.Item(1).Parent.FullFolderPath
    End If
End Sub

Thank you, that does help - although I had hoped there would be a more user friendly way to determine a messages physical location, that way I could deploy it to multiple machines without having to ask the user to create and execute a VBA macro.

The "In folder" field can be added to the view or you can look on the File tab, next to the Move to Folder command to see the folder name, but if you need to see the path to the folder, can pull it up from the Advanced Search dialog - open the message, press Ctrl+Shift+F to open advanced find then click Browse - the message is in the current folder. Complete instructions and screenshots are here: Find the Outlook folder  

this doesn't seem to work in outlook 2013 if the folder is a few levels deep

The macro or the In Folder field? The In Folder field only displays the folder name, not the path. The macro shows the full path.