DNS Mapping Error for Active Directory application upon test connection

[enistriminsait (Emanuele Nistri)]

Sorry, I wrote wrong. The Correct version is:

Also, you can have a problem with DNS server that dont resolve the name correctly. Try to change it.

@shijingg

Am I correct to say that the firewall is cleared?

I think yes, so I think the problem is un DNS that couldnt resolve correctly the name.