Force login screen while using SSO

For the Portal logon we’ve implemented SSO. However sometimes we need to login by specifying username and password, in case we want to simulated a user problem. To logon as ‘Administrator’ we are using the short hostname instead of the full qualified domain name. But we can’t use this mechanism for the users because SSO to the backend systems won’t work anymore.

Is there a way to force logon by username/password and the SSO connection to the backend systems are still working.

Kind Regards,

Evert Schuiteman