Unable to view PDF attachment from Outlook to Adobe

Hi, we have Business CPC, and we are having an issue opening pdf attachments from Outlook to Adobe DC/Reader. We are getting an error "There was an error opening this document. Access Denied." I compared the settings I have on my local PC adobe and CPC everything is the same. Note that only PDF attachments are having this issue, the word, excel and jpg attachments are working just fine.

Can anyone advise? Thanks in advance!