This setting determines what search mode you are using. The following list details which search is compatible with which version of SharePoint:
SharePoint Foundation: Basic/Keyword
SharePoint Server Standard: SQL/Enterprise Search
SharePoint Server Enterprise: SQL/Enterprise Search
          SharePoint Foundation: Basic/Keyword
SharePoint Server Standard: SQL/Enterprise Search
SharePoint Server Enterprise: SQL/Enterprise Search
SharePoint Server with FAST: FAST
Search Mode
| Applies to: | 7.x Email Manager for Outlook 6.x Contributor Pro, Email Manager for Outlook | 
| MSI Property Name | SEARCH_MODE | 
| Registry Root Key Priority | HKEY_CURRENT_USER | 
| Registry Key Location | ...\Contributor\EmailManager\Search\ | 
| String Value Name | SearchMode | 
| Possible Value Data | 0 Keyword search 1 SQL/Enterprise search 2 FAST search | 
| Default Value | 1 | 
For details on applying a configuration setting, please refer to the article How to apply a Configuration Setting.
