If the URL of a CRM Online instance is changed following the deployment of a Portal Add-on application, navigating to the portal website will present the following error:
Server Error in '/' Application
Runtime Error
Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.
Server Error in '/' Application
Runtime Error
Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.