While adding the identity provider, do not specify the login URL and clear the show card option. Use the login URL to access the service provider:
https://idp.sitea.novell.com/nidp/saml/idpsend?
PID = https://idp.siteb.novell.com/nidp/saml/metadata&
TARGET = https://idp.siteb.novell.com/nidp/app
In the identity provider, while adding the service provider, configure ID in the intersite transfer page. Configure the login URL with port number -2443 instead of the provider ID URL:
https://idp.sitea.novell.com:2443/nidp/saml/idpsend?
id = <idname>&TARGET=https://idp.siteb.novell.com:2443/nidp/app