Recently I have some customers asking to implement Fiori authentication. They don't want the users to key in the SAP username / password. Instead, everyone shall enter their Active Directory username / password.
First we install a brand new SAP J2EE instance, then point the UME to LDAP
Then we install the Identity Federation component, using SUM
Now configure SAML2 in J2EE NWA. Make sure when you create the service, the operation mode needs to be "Identity Provider and Service Provider"
Finally download the metadata for next step
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