PDF issue


I'm IT in our company, am using  Sophos Central endpoint protection.

I have issue with a lot of users that they can\t open PDF that they downloaded through email, i tried open it from browser and PDF reader not working.

Tried check for update in adobe but didn't work.

Here the Pic
[edited by: Saud Bakoben at 8:54 AM (GMT -7) on 20 Aug 2023]