Policy
Prevent indexing e-mail attachments
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.
4bd8edf35a58 PreventIndexingEmailAttachments Registry
Copy registry mappings
HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search\PreventIndexingEmailAttachments (enabled) = 1
HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search\PreventIndexingEmailAttachments (disabled) = 0Policy notes
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.