Hi All,   Can anyone confirm if ad-hoc group chat is possible between IM&P and skype for businesses federated over expressway?   I don’t think it is. The only doco I can find for federated group chat is for XMPP federation, nothing for SIP, but I can...

I ran into this bug after a recent upgrade. We managed to find a workaround by sending the request via a load balancer and configuring it to strip the referrer header before forwarding to CUCM.