Annoyingly when you do a search for a message in Outlook the results don’t show you which folder the message(s) are in. This is especially a problem when you’ve inadvertently moved items and need to track them down again.
The workaround is quite simple:
* Do the search within Outlook as normal, and in the results list open (double-click) the message you are interested in.
* Hit Ctrl+Shift+F to bring up the Advanced Find dialog.
* Click the Browse button and the folder list shown will have the folder where the message resides indicated with a check mark.