On a client, open the PARTapplicationServer Dashboard.
https://servername.cadenas.internal:9022/webapps/appserverwatch/index.html
Click on the lock icon (here exemplified by Edge).
Click on the icon Show certificate.
Via Windows key + R key and the entry certmgr.msc, open the Windows Certificate Manager.
On the desired certificate, perform a double-click.
On the tabbed page Details, under Subject Alternative Name, you can see the DNS names.
In PARTadmin, in the task bar, right below, the following is displayed:
In case of error the icon is red.
Furthermore in error case, when calling the Dashboard, "Insecure" is displayed.