Contact your companies IT Admin if you need to upload documents outside of the approved list.
Why do I get an error when I try to upload documents to the internet with the browser inside the Knox container?
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[Environment]
Samsung device
Knox 2.8+
[Summary]
As of Knox 2.8, IT Admins can define a list of pre-approved websites that you can upload documents to using the browser inside the Knox container – other websites will be blocked.