FIX: Cannot Preview EXCEL Files in Outlook 2016
regedit
:
regedit
:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PreviewHandlers
Excel:Name Data {21E17C2F-AD3A-4b89-841F-09CFE02D16B7} Microsoft Visio previewer {65235197-874B-4A07-BDC5-E65EA825B718} Microsoft PowerPoint previewer {84F66100-FF7C-4fb4-B0C0-02CD7FB668FE} Microsoft Word previewer {00020827-0000-0000-C000-000000000046} Microsoft Excel previewer
:
:
REG Double Click
100 %
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https://appuals.com/cannot-preview-e...-outlook-2016/