You have a SAML 2.0 identity provider and service provider in your landscape.
You have configured your legacy systems to accept logon tickets.
The user ID of users on the service provider is identical to their user IDs on the legacy systems.
Not all releases of SAP software support Security Assertion Markup Language (SAML) 2.0. These systems can still benefit from having SAML 2.0 in the system landscape. Configure your service provider to issue logon tickets when a user logs on. This enables legacy systems within the domain to perform Single Sign-On initiated by the SAML 2 authentication.