Instant search stopped working for me. Now if I search for even the
letter "a", I get the following message: No matches found for: "a".

When I ask "advanced find" to find any emails with categories contains
TNE01, it returns no results. However, advanced find works somewhat.
For example when I look for items in my inbox with "a" in the subject
line, it returns 78 matches.

When I use "search folders", to find emails with categories = TNE01,
14 items are returned. When I use "search folders" to find items with
"WC" in frequently used text fields, it returns 765 items.

When I use Windows Desktop to search for TNE01 in email, nothing is
returned. But Windows Desktop does search emails. If I search for
WC, it returns 112 email items in "Personal Folders".

Earlier today it said it was done indexing... now instant search says
it has to index 12,155 items...