I am running a windows Server 2019 standard which user connect to through RDP choosing a domain name: Testing.company.com.
The Server is not in a domain and remote desktop services are installed.
The wildcard certificate is installed in order to match the machines name.
If the user connects to the machine the yellow warning is shown because the certificate presented is not the wildcard but a selfsigned.
I did choose the wildcard cert in the RD Gateway Manager properties (see attachment) but it still presents the wrong one.

Any Idea where else I have to change the settings?
Thanks in advanced!