Rebuilding search index

If you search for items in Microsoft Office Outlook 2007 and 2010 and do not receive the results that you expect, the indexing of your Microsoft Windows and Microsoft Office system data files (the search catalog) may not be complete.

Symptoms of an incomplete index include the following:

• Partial or no search results are returned.
• Items that you expect to appear based on your search criteria are not displayed.

You can rebuild the search catalog, which restarts the indexing of your data files. The search catalog is a file where all of your Outlook and Microsoft Windows items (data files) are indexed. To rebuild your search catalog, do the following:

1. Exit Outlook.
2. In Microsoft Windows, click the Start button, and then click Control Panel.
3. Do one of the following:
• Windows Vista Click System Maintenance, and then click Indexing Options.

Note In Classic view, double-click Indexing Options.

• Microsoft Windows XP Under See Also, click Other Control Panel Options, and then click Indexing Options.

Note In Classic view, double-click Indexing Options.

4. Click Modify, select the check boxes for the locations you want to index, and then click OK.
5. Click Advanced.
6. Click Rebuild.
7. Restart Outlook

http://office.microsoft.com/en-us/outlook-help/reset-indexing-by-rebuilding-your-instant-search-catalog-HA010237832.aspx