Hello @gui planes
I completely understand your concerns. Handling certificates within an RDS environment can indeed be a bit challenging. However, I would suggest taking a look at read Using certificates in Remote Desktop Services | Microsoft Learn first. This guide might help you ensure that all the configurations are accurate.
Is the SSL certificate self-signed or issued by a certificate authority (CA)?
Does the Common Name (CN) on the SSL certificate match the domain or hostname you're using to access the server?