Policy
Do not allow attachment previewing in Outlook
Microsoft Office
Policy overview
Key metadata and intent for this policy.
This policy setting controls whether Outlook users can preview attachments in e-mail messages. If you enable this policy setting, users cannot preview attachments within Outlook. Users must instead use the appropriate application to view attachments, depending on security settings. This configuration can be used to guard against theoretical future zero-day attacks that target specific file types. If you disable or do not configure this policy setting, Outlook users can preview certain types of e-mail attachments within the message window or Reading Pane by clicking the icon that represents the attachment. Users can preview Outlook items, Word documents, PowerPoint presentations, Excel worksheets, Microsoft Visio® drawings, image files, and text files. To help protect users from malicious code, active content embedded in attachments (including scripts, macros, and ActiveX controls) is disabled during a preview.
Registry values
How enabled and disabled states update the registry.
| Scope | Registry location | Type | Enabled value | Disabled value | Copy |
|---|---|---|---|---|---|
| User | Path software\policies\microsoft\office\16.0\outlook\preferences Value name disableattachmentpreviewing | REG_DWORD | HKCU 1 | HKCU 0 |
Policy elements
Inputs and configuration options exposed by this policy.
This policy has no additional user input fields.