Single Sign-On 
Single Sign-On (SSO) is a simplified method of logging on to the SAP system without reducing security. When a system has been configured for Single Sign-On, an authorized user who has logged on to the operating system can access the SAP system simply by selecting it in the SAP logon window or clicking on the shortcut. The user is authenticated by Windows or some other trusted authority so no SAP password is required. All SAP supported single sign-on options are also supported by the connector.
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Single Sign-On Technology |
Scenario to Use |
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Kerberos |
When client has SNC Kerberos library. Use with rich client applications to provide single sign in same way as SAPGUI. Can also be used with ASP .NET impersonation |
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NTLM |
When client has SNC NTLM library. Use with rich client applications to provide single sign in same way as SAPGUI. Can not be used with ASP .NET impersonation |
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X.509 Certificates |
Web scenarios – especially internet scenarios where client is not inside the firewall |
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Microsoft Passport |
Same as X.509 certificates |
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SAPSSO2 |
With Enterprise Portal |
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SAPLoginForm |
User name and password authentication in an ASP .NET web form can be used for all web scenarios |
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SAPSSO1 |
With older ITS scenarios |
Further Information