Hi Matthieu and Dean,
I am a Product Manager and a Developer Advocate with Centrify. It seems that Dean has the Discourse side of things covered here, but I wanted to get in touch and tell you that if at any point you need help with the Centrify side of the configuration, please loop me in and I am happy to help. I can set up a call for all of us to work through this too if that is helpful. You can reach me at devsupport@centrify.com.