How to Configure Power BI Server for extranet access

Dears,

I have installed the Power BI Server V2.47.4766.1221 64-bit (June 2017) under Windows Server 2012 R2 and tested under intranet works perfect.

However, May I know the steps what & how to configure so Power BI Mobile could connect to the Power BI Server ?

Remarks :

1. Have moved the Power BI Server under DMZ network with public IP

2. Noticed configure WAP and ADFS could achive this objective but do follow below sequences is correct or please comment any further advise.

2.1 Configure extranet access for AD FS on Windows Server 2012 R2
https://msdn.microsoft.com/en-us/library/azure/dn528859.aspx

How to install and configure Web Application Proxy for ADFS (With Screen Shot)
http://www.mistercloudtech.com/2015/11/25/how-to-install-and-configure-web-application-proxy-for-adfs/

2.2
Checklist: Configure extranet access for AD FS on legacy versions of Windows Server
https://msdn.microsoft.com/en-us/library/azure/dn151313.aspx

Thanks 

Andy