Enable this policy to prevent indexing of any Microsoft Outlook items. The default is to automatically index Outlook items. If this policy is enabled then the user's Outlook items will not be added to the index and the user will not see them in search results.
Policy path:
Windows Components\Search
Scope:
Machine
Supported on:
Microsoft Windows Vista or any version of Windows with Windows Search 3.01 or later
Registry settings:
HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search!PreventIndexingOutlook
Filename:
Search.admx