Control rich previews for attachments

Policy ID: RichAttachmentPreviews
Scope: Computer Configuration
Supported on: Microsoft Windows XP, or Windows Server 2003 with Windows Search version 3.01 or later
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Search

Description

Enabling this policy defines a semicolon-delimited list of file extensions which will be allowed to have rich attachment previews.

When this policy is disabled or not configured the default settings will be set to .bmp;.emf;.gif;.jpg;.jpeg;.png;.wmf;.wrn;.txt;.err;.xml;.cpp;.c;.h;.cxx;.hxx;.idl;.cs;.vb;.idl;.xsd;.doc;.docx;.xls;.xlsx;.ppt;.pptx;.vsd;.xlsb;.xltx;.dot;.rtf

Options

Control Rich Previews for Attachments

Registry

ComputerHKEY_LOCAL_MACHINE

HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search View registry values

RichAttachmentPreviewsREG_SZ

Other policies in the same category

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