Outlook stops previewing pdf files

Occasional Contributor

Hi,

I have a weird problem with some of my users.

 

Situation: Some employees uses the preview functionality of Outlook 365 to see pdf files attached in emails.

 

Problem: The preview works fine but suddenly it just stops working. We need to reboot the computer and it works again only to stop some time later again.

 

Do you know what could cause such a weird behavior.

 

Cheers 

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