Windows 7 search (and MS Outlook 2007 instant search) by default are searching for whole word match only rather than character string search. I thought default was character string search which happens to include whole word search.
Example of problem: Search on string "123" will return "123" as standalone string, but if embedded, eg. "ABC123" or "XYZ123UVW", the search does not return hits.
I have searched in vane for Search options or configuration and have rebuilt Outlook index all to no avail.