Security News > 2022 > March > Microsoft PowerToys breaks Outlook PDF preview

Microsoft says the Outlook PDF preview feature might be broken for some Microsoft 365 customers on systems where the company's PowerToys open-source toolset is also installed.

According to Microsoft, one of the reasons this error is displayed is the PDF preview File Explorer add-on bundled with Microsoft PowerToys.

This add-on will override the PDF Preview setting in Outlook for Microsoft 365.

To mitigate the issue, you can disable the PDF icon preview option in PowerToys by opening the app, clicking File Explorer Add-ons on the left sidebar, and toggle off "Enable PDF preview."

Another issue that could lead to PDF attachment preview problems in Outlook for Microsoft 365 is having Adobe Acrobat Reader installed in a different bitness than the Outlook Desktop app.

"If your bit version of Adobe Acrobat Reader and Outlook are the same, go to Issue 2. If they are different, uninstall the current version of Adobe Acrobat Reader," Microsoft added.

News URL

https://www.bleepingcomputer.com/news/microsoft/microsoft-powertoys-breaks-outlook-pdf-preview/