Lock Screen Download File

I want to be able to download a file when the lock screen in active. Basically I have written a program that will go to a URL and just download a report, but this report must be downloaded using the "File Download" dialog.

I have attempted:

This is using autoitx3 in C# but the syntax is all the same.

I am navigating to a download URL using IE.

au3.ControlFocus("File Download - Security Warning", "", "[CLASS:Button; INSTANCE:2]");
au3.ControlSend("File Download - Security Warning", "", "[CLASS:Button; INSTANCE:2]", "!s"); // i tried all variations of alt down, alt up, {alt} clicks {enter}, etc

I have tried ControlClick which also does not work. It all works when the lock screen is not active. I know from reading the FAQ we cant use any of the WinActivate commands because they can not be active.

My main issue is I need this program to run on a Windows desktop, and all those are locked until you log in, with a remote desktop client.

This issue has been posted several times on this forum but never solved, they are also old topics, if anyone has any suggestions I would really love to hear them.