Connect PowerBI to Dynamics CRM 2015 (on-prem)

Hi there,

We are trying to connect Power BI Desktop App using the OData Feed to Dynamics CRM 2015 (IFD-facing deployment). I followed the following articles but it doesn't seem to be working. Any ideas? Also, the client is using Windows Server 2012 instead of 2016 where the ADFS is. Please advise. 

1. technet.microsoft.com/.../dn708055.aspx

2. https://www.cobalt.net/2018/04/27/connecting-power-bi-microsoft-dynamics-365-premises/

Thank you!