I am facing an issue in similar scenario, messages and presence cant able to reach, Can someone provide the configurations done on Exp-c and Exp-e including search rules and zone ? also provide me the details regarding certificate requirements and co...
Under same scenario i am also facing issues;
is it inter domain or intradomain ?
I dont think so im & p supports xmpp federation with skype for business, it supports sip federation
can you provide the link for the document you followed for deploying...