Hi Joe,
this is without guarantee for correctness:
- Server to Server SNC - no SAP SSO license required
- Client to Server SNC - encryption only, no SSO ("SNC Cient Encryption") no SAP SSO license required
- Client to Server SNC including SSO (Secure Login Client installation on PCs needed) - SAP SSO license required!
- SPNego (on AS ABAP) - SAP SSO license required!
- SPNego (on AS JAVA) - no SAP SSO license required
Product management will tell your more reliably if you post your question to SAP Single Sign-On.
Regards,
Lutz