We have configured cFolder to work with SRM ABAP (D11) and Portal (DJ1)
and it's working fine.
SSO also configured from Portal to SRM ABAP, ECC, and BW as backend withtype UIPWD.
But SSO to cFolder doesn't work.
Creating a system with alias SAP_CFOLDERS in the portal doesn't help.
I have read [cFolder Integration with SRM 7.0 in RFx; and it said that:
If you use NetWeaver Portal, SSO setting is same manner you did for SRM. Portal -> SRM and Portal -> cFolders.
But the login window still appear.