windows azure virtual machine ad join

Hi.

I have two virtual machines in windows azure.

On one virtual machine, I installed AD DS.

And I want to join one machine to another machine.

But I can't join and can't ping.

So I turned off windows firewall of both machines and added end point of 80 port.

But I can't join and ping.

In this case, how can I resolve it?

In windows azure virtual machine, how can I set network between machines?

Thanks in advance.