Url links for attachements


My Ict department blocked out all website except for the tools we use

On the tablets we want to view .jpg and .pdf files

As far as i know they are stored on com.smartsheet.android.file/attachments or s3.amazonaws.com ?

we gave both urls premissions to beeing viewed but still it says

Links of content are blocked, anyone got an idea of what url to unblock so we can see the atachments.