After changing the Management HTTPS port from the default of 443, or after changing the hostname, clicking the links in the SEDR alert emails brings up a failed connection page.
Whether you change the hostname or UI port in the UI or in the CLI, the email template will not currently use the hostname of the appliance, nor update for the change of port.
This issue will be resolved in SEDR 4.5 by changing the underlying logic to build the appliance URL from the correct configuration files.