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Joseph SalazarFlag for United States of America asked on

All PDF's in Outlook 2016 will not open virus Message

I have a client who out of nowhere all of a sudden will not open PDF attachments

I tested and he can open any other document attached even in the same email

can open word and excel but not PDF it gives him the error Message below

Removed and reinstalled Adobe Same issue

Uninstalled antivirus rebooted tested same issue

Ran Registry Fix found here: https://www.youtube.com/watch?v=KgYGY9NbMqA

Same Issue

How can I repair????

OutlookPDFMicrosoft Word

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Last Comment
Joseph Salazar

8/22/2022 - Mon

PDF extension is denied from Outlook. What happens if the same PDF attached to the Mail is saved on the Desktop? Can you open it from the Desktop?
Joseph Salazar

Yes I can

Run Outlook with admin rights, open PDF, when warning appears, say allow PDF/no warning. Now the normal user will have the same settings.

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Joseph Salazar

It works in Safe mode so I went into options and un checked all addins

Closed Outlook and reopened it and does the same thing

ran Outlook.exe /resetnavpane   same issue

What am I missing here?


You missed the steps I told you, obviously.   

Joseph Salazar

ran C:\Program Files\Microsoft Office\root\Office16\outlook.exe    in Admin Mode

Same issue  did not get option to allow PDF's
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Joseph Salazar

Thanks Kimputer,

Already ran that Repair from Utube link in original Question

Called Microsoft and we spend 2.5 hours on the phone even setting up another Profile caused the Same Error

They Said to Uninstall Office Reboot PC  Delete Microsoft Office folder in Program files and Program data

Reboot and do fresh install....

Will Try that when I get a chance...
Arana (G.P.)

editing that registry entry fixed the problem, are you sure you have the same version of outlook as the one in the video? in cas you do not, then the number would be different in your registry key
Joseph Salazar

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