By default the url for the end user portal in service manager is https://PortalServer.domain.suffix/Enduser, not really convient.
So we are going to modify the url to https://PortalServer.domain.suffix
Add the URL redirection component to your portal server. ( Add role service )
Select http redirection.
Open your IIS manager and select the SCSMPortal Site.
Now the select the HTTP redirect button on the right side.
Enable the redirection and select the option “Only redirect requests to …”
Apply and test !