Custom subdomain redirection

[seungri400]

I’ve seen my exact question posted here before, but unfortunately in nearly two years there has not been a response, so I am reposting it here.

@josh.cole

I have a custom domain configured on a production tenant login.mydomain.com. If a user visits https://login.mydomain.com without /login?... they are redirected to mydomain.com. Is there a way to change this redirect to be app.mydomain.com instead?