2012r2 RDS and XP Embeded

Hi im trying to connect some XP embedded thin clients to my new 2012r2 remote desktop server but they fail as soon as I try to connect.
I can ping the server etc so don't think its that.

They can however login to the PDC which is running Windows Server 2012 so im not sure what the issue is.

Other normal Widows 7 machines can login to the RDS completely fine.

Any suggestions would be great.

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Shot in the dark, but I would take a look at the Network type on the server. If it is public that would explain some of the thin stations not connecting to the server. The thick stations would still be able to connect because they are part of the domain. If it is a public network the thins on the other hand would be getting rejected from the server.
RedDoorSuppliesAuthor Commented:
Where would I check that setting?

I don't think it would be that as I have a Windows 8.1 laptop that is not part of the domain just on the Wi-Fi but I can connect to the remote desktop server all ok?
Cliff GaliherCommented:
RDS on 2012 R2 defaults to requiring NLA.  XP doesn't support NLA, Win7 does. That's the big troubleshooting sign that pointing to an NLA issue.

You can forcibly disable NLA on your RDS server with a local or group policy, but I *strongly* recommend against it. There are known security exploits that are exposed when NLA is disabled. It's time to replace those thin clients.

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RedDoorSuppliesAuthor Commented:
Thanks I decided to replace the RDP server in the end so didn't need to amend the security setting.
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