Excel Preview Not Working in Outlook

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Cannot Preview EXCEL Files in Outlook 2016

We can observe that “Cannot Preview EXCEL Files in Outlook 2016” appears in this window.

Launch the application that manages the type of file you wish to preview in its entirety. For example, if you’re looking to get a sneak peek of a, you.
Options pertaining to the user interface can be accessed by selecting File > Options > General from the menu bar.
In the event that it is required, restart the application.
a representative of any additional Office application that you would like to preview within Outlook.
Listing of Contents (Table of)
The preview function in Outlook 2016 is not compatible with Excel files Conclusion

Excel files won’t preview in Outlook 2016

Users who upgraded to Office 2016 have reported that the reading window of Outlook no longer allows them to preview Excel files. This change was introduced in Office 2016. When they choose an attachment in Excel, they are presented with the following error message:

This file does not have a previewer associated with it, thus it cannot be seen at this time.

This is because there is an incorrect entry in the registry for the preview handler. Even though this will be fixed in a future version, you can take care of it right now by updating the registry with the values that are listed below.

See also: the problem with wireless doorbells.
A click-to-run installation, which encompasses the vast majority of customers, necessitates the following registry keys to be present:

HKEY LOCAL MACHINE\SOFTWARE\

Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\PreviewHandlers

“21E17C2F-AD3A-4b89-841F-09CFE02D16B7” is what the REG SZ value should read.
Previewer for Microsoft Visio, having value

REG SZ: {65235197-874B-4A07-BDC5-E65EA825B718}
Previewer for Microsoft PowerPoint in terms of value

: 84F66100-FF7C-4fb4-B0C0-02CD7FB668FE in the REG SZ file.
Value: the previewer for Microsoft Word

REG SZ: {00020827-0000-0000-C000-000000000046}
Value: Microsoft Excel Previewer
You also have the option of executing this registry file, which will add the settings to your system’s registry.

MSI / volume licence

The following are the keys that need to be changed if you are installing Office from an MSDN subscription or if you are making use of the volume licence known as “MSI.”

The most important factor is whether or not you are running 64-bit Windows and 32-bit Office.

HKEY LOCAL MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\PreviewHandlers
If your version of Windows and Office are both 32 bits or 64 bits, you should use this key:

HKEY LOCAL MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PreviewHandlers
Both instances have string values that are identical to one another.

“21E17C2F-AD3A-4b89-841F-09CFE02D16B7” is what the REG SZ value should read.
Previewer for Microsoft Visio, having value

REG SZ: {65235197-874B-4A07-BDC5-E65EA825B718}
Previewer for Microsoft PowerPoint in terms of value

: 84F66100-FF7C-4fb4-B0C0-02CD7FB668FE in the REG SZ file.
Value: the previewer for Microsoft Word

REG SZ: {00020827-0000-0000-C000-000000000046}
The Microsoft Excel Previewer is of value.

Conclusion

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