Windows 10 IOT LTSB support

Windows 10 IOT LTSB support

We have been told that Windows 10 IoT Enterprise LTSB is not supported - although the link support send us says Windows 10 is supported, if they are going to exclude Windows 10 IOT they should say that in the documentation.
Has anyone got the agent working? We have tried and the agent installs fine can see the service is running but it doesn't connect to the portal

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