Hello Madhu,
You may have to configure SSO product from SAP to provide for SSO using SAPGUI
Single Sign-On for the SAP GUI - User Authentication and Single Sign-On - SAP Library
If you can live with SAP WEBGUI (Integrated ITS), this can be achieved using SAP Logon Tickets.
Using Logon Tickets - User Authentication and Single Sign-On - SAP Library
Regards,
Siddhesh
