Microsoft Outlook Question:

The Contact Quick Find feature stores each search. If an item is already in the list, you can select it quickly for a repeat search. But the list can rapidly grow too large to be helpful. Outlook stores search items in the Registry. To clear the list, delete the following Registry key:

HKEY_CURRENT_USER\Software\Microsoft\Office\version\Outlook\QuickFindMRU

Note: Editing the Registry is risky, so be sure you have a verified backup before saving any changes.