Do you trust the publisher of this remote app program -How to get rid of this?

Question

Hey friends,

I'm trying to make this process smooth for users who access it from outside public internet and would like this pop screen to not show up. I've tried so much with no luck. In my computer GPO, I've tried adding the Thumbprint of the certificate, with no luck. I found notes online that said to take the thumbprint, take out the spaces and make all caps but no luck..
I have have a wildcard ssl certificate applied on RDweb access link/Gateway/session host controller/connection brokers. but after login when you click on any published remote app program like calculator, than it popups up this trust publisher windows which is annoying for users.

When I check this from local server itself it works well without popup but when you access from any web browser over public internet it is the issue.

popup that I am trying to get rid of -
![239469-e35c424e-0112-470c-a5ab-f0a4908f3c87.png][1]

Active Directory​ SSL​ Microsoft Corporation Remote Desktop Services​
Image
I am using windows server 2022.

Any help/suggestions appreciated.

Thank you