Need help with ADFS – SSO issue.  IFS Apps10UPD7 installed Windows 2016 OS. 

The ADFS is configured for user authentication. The custom claim using UPN as mentioned in Help doc is added. The user can log into the IFSApps successfully by typing the credentials in the ADFS login screen, but the SSO login for the same user failed with 400 error.

Ifs.Fnd.FndSystemException: Unexpected error while calling server method ClientApplication/IdentifyCurrentUser

   at Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(Object requestBody, Object responseBody, String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Boolean forcedSync, Boolean integrationGateway)

   at Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(String intface, String operation, Object requestBody, Object responseBody, FndRequestContext requestContext, Boolean forcedSync, Boolean integrationGateway)

   at Ifs.Fnd.AccessProvider.Interactive.FndLoginDialog.AuthenticateCredentials(FndLoginCredentials loginCreds) ---> Ifs.Fnd.FndSystemException: 400

   at Ifs.Fnd.AccessProvider.FndConnection.CallGetResponse(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Bytei] requestHeaderBytes, Byter] requestBodyBytes, FndApfAsyncInvoke asyncInvokeHandle, Boolean integrationGateway)

   at Ifs.Fnd.AccessProvider.FndConnection.InvokeGetResponse(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Bytee] requestHeaderBytes, Byted] requestBodyBytes, Boolean& abandoned, Boolean forcedSync, Boolean integrationGateway)

   at Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(Object requestBody, Object responseBody, String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Boolean forcedSync, Boolean integrationGateway)