Hello Daniel,
SAP Supports single sign-on for SAP GUI for Window via SNC. SAP Single Sign-On is the SAP product that offers a library and a client for such implementation, where the solution could be based on Kerberos tokens or X.509 client certificates. The implementation of any SSO solution for SAP GUI for Windows requires SNC configuration as the one visible on your screenshot.
Regards,
Donka Dimitrova