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When I have enable PDF Preview Handler in Outlook 2016, and I open and close a PDF attachment, outlook 2016 is restarting. It happends in Public Folders when
Above is the setting you have talked about Outlook 2016. Would you please confirm the name of the application used as default PDF viewer app?
Are you using Adobe Reader/Acrobat to view PDF, which is causing the Outlook to crash?Please refer and try the troubleshooting steps from the following KB doc Office 2016 crashes with Acrobat DC or Acrobat PDFMaker
You may also refer to Troubleshoot errors, freezes | Adobe Reader | Windows
Let us know if this doesn't work. And if you managed to find the solution, then please help us with the result.