You have defined the SAP Identity Authentication Service Tenant as Platform Identity Provider in the SCP Neo subaccount according to documentation: Platform Identity Provider.
However user can still login with S-user or P-user credentials of default Platform Identity provider: accounts.sap.com.
SAP Cloud Platform NEO Environment
KBA , BC-NEO-SEC-IAM , Authentication, Authorization(Cloud Platform Neo) , BC-NEO-INFR , SAP Neo Infrastructure , Problem
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