Nov 26 2018 05:55 AM
We found the issue, although it's a weird one. We have a GPO which does stuff with the proxy settings, which seems to interfere with the LGateway registration task. The GPO is also applied to the other DC, which is sat happily connected to the Center, so it appears that our settings were only causing issues for the Registration of the new LGateway, not for the normal Running operations.
Thanks for the suggestions. If you need any more info for development or for your docs, let me know and I can supply.