It is possible to configure a custom domain to host Loginapp and Adminapp on any domain you own.
In order to configure a custom domain, mTLS must be configured and at least one tenant activation must have been made.
Loginapp can be configured independently from Adminapp
The Adminapp is never directly accessible, i.e. it requires an SSO-Ticket to authenticate with an underlying configuration supporting it.
When choosing a custom domain, relevant ACME and Custom domain records will be provided to add them to your domain registrar.