Peplink balance 210 Openvpn with AD authenthication.

I’m configuring my balance 210 remote user access (openvpn) with Active directory authentication,
I’m entering the server hostname, domain, admin and password correctly, but when I try to connect with the open vpn client, it fails.

I checked the parameters and tested them and everything is correct. Is there any other configuration that I need to do in my balance 210? I tested it with firmware 8.0,8.1, 8.1.2 and 8.1.3 and still do not work.
I have been generating the openvpn script for any firmware upgrade that I have performed… still doesn’t work.

please help!

Do you think the post by @MartinLangmaid could help?