ADFS 2016 and SAP Cloud Platform

Hello,

I'm working as an IT consultant and i've created a trial account to test ADFS 2016 Federation with SAP Cloud Platform for a Customer.

I followed step by step the following link :

https://blogs.sap.com/2017/01/25/how-to-configure-ms-adfs-3.0-as-identity-provider-for-sap-hana-cloud-platform/

The configuration seems ok, but when i try to go to the URL https://iotcockpitiotservices-p1943013815trial.hanatrial.ondemand.com/com.sap.iotservices.cockpit/ with a standard AD account, there is a popup asking credentials and then the following error : "

"Missing Authorization
You are not authorized to access this page. Check the URL or contact your administrator.
Reload application"

If i try to go to "https://ADFSFQDN/adfs/ls/idpinitiatedsignon.aspx?logintoRP=https://hanatrial.ondemand.com/p1943013815", i have the following error :

"HTTP Status 400 - Service Provider endpoint saml2/sp/acs could not redirect to original application URL because it has not received RelayState."

What am doing wrong ?

FYI, i'm a complete beginner for the SAP part...

Thanks for your assistance