Prevent indexing e-mail attachments
- Policy ID
- PreventIndexingEmailAttachments
- Scope
- Computer Configuration
- Supported on
- Microsoft Windows Vista, or any version of Windows with Windows Search 3.01 or later
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Search
Description
Enable this policy setting to prevent the indexing of the content of e-mail attachments. If enabled, indexing service components (including non-Microsoft components) are expected not to index e-mail attachments. Consider enabling this policy if you are concerned about the security or indexing performance of non-Microsoft document filters (iFilters). This policy is disabled by default.
Registry
ComputerHKEY_LOCAL_MACHINE
- PreventIndexingEmailAttachmentsREG_DWORD