How to retain the property of a setup file uploaded to my azure appservice

Question

I have an appservice in azure hosting my application .The appservice is running on Windows appservice plan. On the website user can download an executable file (exe) that has a digitally signed certificate. However after downloading, the file gets flagged as containing virus by the anti virus running on the device it is downloaded. Also the antivirus won't allow user run the setup file. I have this same file on my local machine and it works fine This file is digitally signed however when users download the file from the website it doesn't have the digital signed certificate on it. I would like to know if there is a way I can publish this file to my website so that when user download it...it won't be flagged as containing virus and also users should be able to run the setup file.