La méthode ici :

Search for message (or other document). Use the normal quick search, searching for "all files and folders"
Open the message/document (double-click)
With the message open in i separate Window: Hit Ctrl+Shift+F to open Advanced Search.
Advanced Search will open with the folder of the open message selected.
Click Browse (top right) to see where that folder is.

On n'est pas loin de l'exosquelette d'Aliens, le retour.
Enfin...