Enabling this policy prevents users from adding UNC locations to the index from the Search and Indexing Options in Control Panel. Any UNC locations that have already been added to the index by the user will not be removed.When this policy is disabled or not configured users will be able to add UNC locations to the index.This policy has no effect if the Files on Microsoft Networks add-in is not installed.Disabled by default.
Policy path:
Windows Components\Search 
Scope:
User 
Supported on:
Any version of Microsoft Windows with Windows Search 4.0 or later 
Registry settings:
HKCU\SOFTWARE\Policies\Microsoft\Windows\Windows Search!HideUNCTab 
Filename:
Search.admx 
