I hope someone can help. Finally got hold of Social Engagement ands successfully did the connection configuration on our on-premise CRM 2015. I've then added our URLs in Social Engagement, but when I try to establish the connection in SE, I get an error that SE can't communicate with CRM.

CRM is internet facing with adfs authentication.

Any assistance will be appreciated as this is the final piece of a bigger infrastructure jigsaw that I hope to complete.