Connection to the VPN Client from the network of Access Server ROUTING

[AzureBox]

Dear all,
I have configured an OpenVPN Access Server on Microsoft Azure and on the same network there is a windows machine

Access Server
There is the public (static) address of the 20.61.113.145
and the internal is 10.0.0.5/20

Windows Machine
internal address 10.0.0.4/20

VPN Client network
172.28.224.0/24

These are the configuration of a connected client

Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::8561:b59a:9035:392d%16
IPv4 Address. . . . . . . . . . . : 172.28.224.130
Subnet Mask . . . . . . . . . . . : 255.255.255.128
Default Gateway . . . . . . . . . :

I don't get the subnet mask in the beginning. I would have expected 255.255.255.0

From this client I can connect to 10.0.0.4 by NAT

What I would be able to reach is the opposite, that means, being able from 10.0.0.4 machine to RDP the VPN Client.

I have set up in VPN Settings Routing:
Should VPN clients have access to private subnets (non-public networks on the server side)? Yes, using routing
Specify the private subnets to which all clients should be given access (one per line): 10.0.0.0/20

In the user settings:
Select addressing method:Use Routing
Allow Access To these Networks: 10.0.0.0/20
Allow Access From: [checked] all server-side private subnets
Allow Access From: [checked] all other VPN clients

But I cannot connect in any side. The only machine that pings everything is the Access Router that can ping 10.0.0.4 and 172.28.224.130

I have read an article that tries to give instruction:
https://openvpn.net/vpn-server-resource ... e-network/

But I get nowhere.

Anyone was successful in Routing traffic from the OpenVPN Local Network to the the Clients network?

Thanks for any advice,

Matteo

[SeanHub]

Also interested in if anyone knows a good way of doing this. Same problem for AWS, can't seem to connect to any instances even if the appropriate routes are setup in the route table.