I have been using Outlook for many (!) years at work. Consequently I am forced (by Microsoft and our IT staff) to archive my email from time to time when my mailbox gets too large.
My problem is that in Outlook 2010 'Advanced Find' totally fails to locate emails in these PST files. I can open an archive, display a message and search for words I can plainly see in both subject and message body and draw a null result, Furthermore, the nul result is displayed so rapidly it is clear that no searching was done at all. I suspect this has something to do with 'indexing' but I have no idea how to fix it. The PST files are usually not 'active' in Outlook but are opened as I need them.
This vexing problem is making life difficult!